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Finding the Fourth Proportional to 323,038.53, 484,520.13 and 86,399.87

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Solution

The fourth proportional to 323,038.53, 484,520.13 and 86,399.87 is: 129,589.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,038.53 : 484,520.13 = 86,399.87 : x
  2. Step 2: Convert to fraction form
    323,038.53/484,520.13 = 86,399.87/x
  3. Step 3: Cross multiply
    323,038.53x = 484,520.13 × 86,399.87
  4. Step 4: Simplify right side
    323,038.53x = 41,862,473,821.78
  5. Step 5: Solve for x
    x = 41,862,473,821.78/323,038.53
  6. Step 6: Final answer
    x = 129,589.72

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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.