Home / 1,187,305,471.05-1,638,483,477.57-658,669,470.81

Finding the Fourth Proportional to 1,187,305,471.05, 1,638,483,477.57 and 658,669,470.81

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Solution

The fourth proportional to 1,187,305,471.05, 1,638,483,477.57 and 658,669,470.81 is: 908,964,939.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,305,471.05 : 1,638,483,477.57 = 658,669,470.81 : x
  2. Step 2: Convert to fraction form
    1,187,305,471.05/1,638,483,477.57 = 658,669,470.81/x
  3. Step 3: Cross multiply
    1,187,305,471.05x = 1,638,483,477.57 × 658,669,470.81
  4. Step 4: Simplify right side
    1,187,305,471.05x = 1,079,219,045,101,960,320
  5. Step 5: Solve for x
    x = 1,079,219,045,101,960,320/1,187,305,471.05
  6. Step 6: Final answer
    x = 908,964,939.03

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Double scale
Find fourth proportional to 1,187,305,472.05, 1,638,483,478.95 and 658,669,471.81
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.