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Finding the Fourth Proportional to 392.14, 588.18 and 145.35

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Solution

The fourth proportional to 392.14, 588.18 and 145.35 is: 218.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.14 : 588.18 = 145.35 : x
  2. Step 2: Convert to fraction form
    392.14/588.18 = 145.35/x
  3. Step 3: Cross multiply
    392.14x = 588.18 × 145.35
  4. Step 4: Simplify right side
    392.14x = 85,488.30
  5. Step 5: Solve for x
    x = 85,488.30/392.14
  6. Step 6: Final answer
    x = 218.01

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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.