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Finding the Fourth Proportional to 452.16, 679.14 and 391.92

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Solution

The fourth proportional to 452.16, 679.14 and 391.92 is: 588.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.16 : 679.14 = 391.92 : x
  2. Step 2: Convert to fraction form
    452.16/679.14 = 391.92/x
  3. Step 3: Cross multiply
    452.16x = 679.14 × 391.92
  4. Step 4: Simplify right side
    452.16x = 266,168.55
  5. Step 5: Solve for x
    x = 266,168.55/452.16
  6. Step 6: Final answer
    x = 588.66

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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.