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Finding the Fourth Proportional to 425,565.28, 638,348.28 and 105,716.80

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Solution

The fourth proportional to 425,565.28, 638,348.28 and 105,716.80 is: 158,575.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,565.28 : 638,348.28 = 105,716.80 : x
  2. Step 2: Convert to fraction form
    425,565.28/638,348.28 = 105,716.80/x
  3. Step 3: Cross multiply
    425,565.28x = 638,348.28 × 105,716.80
  4. Step 4: Simplify right side
    425,565.28x = 67,484,137,447.10
  5. Step 5: Solve for x
    x = 67,484,137,447.10/425,565.28
  6. Step 6: Final answer
    x = 158,575.29

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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.