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Finding the Fourth Proportional to 425,711.28, 587,623.92 and 253,683.21

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Solution

The fourth proportional to 425,711.28, 587,623.92 and 253,683.21 is: 350,167.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,711.28 : 587,623.92 = 253,683.21 : x
  2. Step 2: Convert to fraction form
    425,711.28/587,623.92 = 253,683.21/x
  3. Step 3: Cross multiply
    425,711.28x = 587,623.92 × 253,683.21
  4. Step 4: Simplify right side
    425,711.28x = 149,070,319,360.26
  5. Step 5: Solve for x
    x = 149,070,319,360.26/425,711.28
  6. Step 6: Final answer
    x = 350,167.65

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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.