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Finding the Fourth Proportional to 425,645.36, 638,468.04 and 145,165.04

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Solution

The fourth proportional to 425,645.36, 638,468.04 and 145,165.04 is: 217,747.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,645.36 : 638,468.04 = 145,165.04 : x
  2. Step 2: Convert to fraction form
    425,645.36/638,468.04 = 145,165.04/x
  3. Step 3: Cross multiply
    425,645.36x = 638,468.04 × 145,165.04
  4. Step 4: Simplify right side
    425,645.36x = 92,683,238,565.32
  5. Step 5: Solve for x
    x = 92,683,238,565.32/425,645.36
  6. Step 6: Final answer
    x = 217,747.56

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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.