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Finding the Fourth Proportional to 473.92, 710.85 and 127.28

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Solution

The fourth proportional to 473.92, 710.85 and 127.28 is: 190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.92 : 710.85 = 127.28 : x
  2. Step 2: Convert to fraction form
    473.92/710.85 = 127.28/x
  3. Step 3: Cross multiply
    473.92x = 710.85 × 127.28
  4. Step 4: Simplify right side
    473.92x = 90,476.99
  5. Step 5: Solve for x
    x = 90,476.99/473.92
  6. Step 6: Final answer
    x = 190.91

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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.