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Finding the Fourth Proportional to 672.52, 928.18 and 392.92

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Solution

The fourth proportional to 672.52, 928.18 and 392.92 is: 542.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.52 : 928.18 = 392.92 : x
  2. Step 2: Convert to fraction form
    672.52/928.18 = 392.92/x
  3. Step 3: Cross multiply
    672.52x = 928.18 × 392.92
  4. Step 4: Simplify right side
    672.52x = 364,700.49
  5. Step 5: Solve for x
    x = 364,700.49/672.52
  6. Step 6: Final answer
    x = 542.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.