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Finding the Fourth Proportional to 425,565.78, 638,349.03 and 105,717.30

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Solution

The fourth proportional to 425,565.78, 638,349.03 and 105,717.30 is: 158,576.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,565.78 : 638,349.03 = 105,717.30 : x
  2. Step 2: Convert to fraction form
    425,565.78/638,349.03 = 105,717.30/x
  3. Step 3: Cross multiply
    425,565.78x = 638,349.03 × 105,717.30
  4. Step 4: Simplify right side
    425,565.78x = 67,484,535,909.22
  5. Step 5: Solve for x
    x = 67,484,535,909.22/425,565.78
  6. Step 6: Final answer
    x = 158,576.04

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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.