Home / 1,321,122.91-1,823,153.12-777,279.19

Finding the Fourth Proportional to 1,321,122.91, 1,823,153.12 and 777,279.19

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Solution

The fourth proportional to 1,321,122.91, 1,823,153.12 and 777,279.19 is: 1,072,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,122.91 : 1,823,153.12 = 777,279.19 : x
  2. Step 2: Convert to fraction form
    1,321,122.91/1,823,153.12 = 777,279.19/x
  3. Step 3: Cross multiply
    1,321,122.91x = 1,823,153.12 × 777,279.19
  4. Step 4: Simplify right side
    1,321,122.91x = 1,417,098,980,359.57
  5. Step 5: Solve for x
    x = 1,417,098,980,359.57/1,321,122.91
  6. Step 6: Final answer
    x = 1,072,647.34

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Double scale
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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.