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Finding the Fourth Proportional to 508,086.40, 762,129.60 and 425,417.80

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Solution

The fourth proportional to 508,086.40, 762,129.60 and 425,417.80 is: 638,126.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,086.40 : 762,129.60 = 425,417.80 : x
  2. Step 2: Convert to fraction form
    508,086.40/762,129.60 = 425,417.80/x
  3. Step 3: Cross multiply
    508,086.40x = 762,129.60 × 425,417.80
  4. Step 4: Simplify right side
    508,086.40x = 324,223,497,746.88
  5. Step 5: Solve for x
    x = 324,223,497,746.88/508,086.40
  6. Step 6: Final answer
    x = 638,126.70

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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.