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Finding the Fourth Proportional to 425,717.44, 639,299.25 and 284,470.25

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Solution

The fourth proportional to 425,717.44, 639,299.25 and 284,470.25 is: 427,188.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,717.44 : 639,299.25 = 284,470.25 : x
  2. Step 2: Convert to fraction form
    425,717.44/639,299.25 = 284,470.25/x
  3. Step 3: Cross multiply
    425,717.44x = 639,299.25 × 284,470.25
  4. Step 4: Simplify right side
    425,717.44x = 181,861,614,275.82
  5. Step 5: Solve for x
    x = 181,861,614,275.82/425,717.44
  6. Step 6: Final answer
    x = 427,188.55

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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.