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Finding the Fourth Proportional to 520,788.13, 781,182.20 and 494,194.21

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Solution

The fourth proportional to 520,788.13, 781,182.20 and 494,194.21 is: 741,291.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,788.13 : 781,182.20 = 494,194.21 : x
  2. Step 2: Convert to fraction form
    520,788.13/781,182.20 = 494,194.21/x
  3. Step 3: Cross multiply
    520,788.13x = 781,182.20 × 494,194.21
  4. Step 4: Simplify right side
    520,788.13x = 386,055,720,195.06
  5. Step 5: Solve for x
    x = 386,055,720,195.06/520,788.13
  6. Step 6: Final answer
    x = 741,291.32

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Double scale
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Similar ratio
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1.5x scale

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.