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Finding the Fourth Proportional to 425,370.78, 587,053.02 and 317,753.88

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Solution

The fourth proportional to 425,370.78, 587,053.02 and 317,753.88 is: 438,531.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,370.78 : 587,053.02 = 317,753.88 : x
  2. Step 2: Convert to fraction form
    425,370.78/587,053.02 = 317,753.88/x
  3. Step 3: Cross multiply
    425,370.78x = 587,053.02 × 317,753.88
  4. Step 4: Simplify right side
    425,370.78x = 186,538,374,870.72
  5. Step 5: Solve for x
    x = 186,538,374,870.72/425,370.78
  6. Step 6: Final answer
    x = 438,531.24

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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.