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Finding the Fourth Proportional to 388.02, 581.89 and 127.97

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Solution

The fourth proportional to 388.02, 581.89 and 127.97 is: 191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.02 : 581.89 = 127.97 : x
  2. Step 2: Convert to fraction form
    388.02/581.89 = 127.97/x
  3. Step 3: Cross multiply
    388.02x = 581.89 × 127.97
  4. Step 4: Simplify right side
    388.02x = 74,466.61
  5. Step 5: Solve for x
    x = 74,466.61/388.02
  6. Step 6: Final answer
    x = 191.91

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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.