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Finding the Fourth Proportional to 392.74, 588.98 and 187.08

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Solution

The fourth proportional to 392.74, 588.98 and 187.08 is: 280.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.74 : 588.98 = 187.08 : x
  2. Step 2: Convert to fraction form
    392.74/588.98 = 187.08/x
  3. Step 3: Cross multiply
    392.74x = 588.98 × 187.08
  4. Step 4: Simplify right side
    392.74x = 110,186.38
  5. Step 5: Solve for x
    x = 110,186.38/392.74
  6. Step 6: Final answer
    x = 280.56

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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.