Home / 1,391,922.81-2,085,165.87-661,406.76

Finding the Fourth Proportional to 1,391,922.81, 2,085,165.87 and 661,406.76

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Solution

The fourth proportional to 1,391,922.81, 2,085,165.87 and 661,406.76 is: 990,818.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,922.81 : 2,085,165.87 = 661,406.76 : x
  2. Step 2: Convert to fraction form
    1,391,922.81/2,085,165.87 = 661,406.76/x
  3. Step 3: Cross multiply
    1,391,922.81x = 2,085,165.87 × 661,406.76
  4. Step 4: Simplify right side
    1,391,922.81x = 1,379,142,802,139.28
  5. Step 5: Solve for x
    x = 1,379,142,802,139.28/1,391,922.81
  6. Step 6: Final answer
    x = 990,818.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.