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Finding the Fourth Proportional to 487.49, 731.22 and 270.93

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Solution

The fourth proportional to 487.49, 731.22 and 270.93 is: 406.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.49 : 731.22 = 270.93 : x
  2. Step 2: Convert to fraction form
    487.49/731.22 = 270.93/x
  3. Step 3: Cross multiply
    487.49x = 731.22 × 270.93
  4. Step 4: Simplify right side
    487.49x = 198,108.08
  5. Step 5: Solve for x
    x = 198,108.08/487.49
  6. Step 6: Final answer
    x = 406.38

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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.