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Finding the Fourth Proportional to 672.42, 927.92 and 451.34

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Solution

The fourth proportional to 672.42, 927.92 and 451.34 is: 622.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.42 : 927.92 = 451.34 : x
  2. Step 2: Convert to fraction form
    672.42/927.92 = 451.34/x
  3. Step 3: Cross multiply
    672.42x = 927.92 × 451.34
  4. Step 4: Simplify right side
    672.42x = 418,807.41
  5. Step 5: Solve for x
    x = 418,807.41/672.42
  6. Step 6: Final answer
    x = 622.84

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Half scale
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Double scale
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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.