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Finding the Fourth Proportional to 508,087.40, 762,131.10 and 425,418.80

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Solution

The fourth proportional to 508,087.40, 762,131.10 and 425,418.80 is: 638,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,087.40 : 762,131.10 = 425,418.80 : x
  2. Step 2: Convert to fraction form
    508,087.40/762,131.10 = 425,418.80/x
  3. Step 3: Cross multiply
    508,087.40x = 762,131.10 × 425,418.80
  4. Step 4: Simplify right side
    508,087.40x = 324,224,898,004.68
  5. Step 5: Solve for x
    x = 324,224,898,004.68/508,087.40
  6. Step 6: Final answer
    x = 638,128.20

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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.