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Finding the Fourth Proportional to 672.27, 928.05 and 506.55

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Solution

The fourth proportional to 672.27, 928.05 and 506.55 is: 699.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.27 : 928.05 = 506.55 : x
  2. Step 2: Convert to fraction form
    672.27/928.05 = 506.55/x
  3. Step 3: Cross multiply
    672.27x = 928.05 × 506.55
  4. Step 4: Simplify right side
    672.27x = 470,103.73
  5. Step 5: Solve for x
    x = 470,103.73/672.27
  6. Step 6: Final answer
    x = 699.28

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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.