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Finding the Fourth Proportional to 636,439.20, 954,637.20 and 163,129.20

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Solution

The fourth proportional to 636,439.20, 954,637.20 and 163,129.20 is: 244,688.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,439.20 : 954,637.20 = 163,129.20 : x
  2. Step 2: Convert to fraction form
    636,439.20/954,637.20 = 163,129.20/x
  3. Step 3: Cross multiply
    636,439.20x = 954,637.20 × 163,129.20
  4. Step 4: Simplify right side
    636,439.20x = 155,729,202,726.24
  5. Step 5: Solve for x
    x = 155,729,202,726.24/636,439.20
  6. Step 6: Final answer
    x = 244,688.26

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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.