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Finding the Fourth Proportional to 438,638.10, 658,019.91 and 135,057.95

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Solution

The fourth proportional to 438,638.10, 658,019.91 and 135,057.95 is: 202,606.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,638.10 : 658,019.91 = 135,057.95 : x
  2. Step 2: Convert to fraction form
    438,638.10/658,019.91 = 135,057.95/x
  3. Step 3: Cross multiply
    438,638.10x = 658,019.91 × 135,057.95
  4. Step 4: Simplify right side
    438,638.10x = 88,870,816,813.69
  5. Step 5: Solve for x
    x = 88,870,816,813.69/438,638.10
  6. Step 6: Final answer
    x = 202,606.24

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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.