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Finding the Fourth Proportional to 672.72, 928.07 and 451.74

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Solution

The fourth proportional to 672.72, 928.07 and 451.74 is: 623.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.72 : 928.07 = 451.74 : x
  2. Step 2: Convert to fraction form
    672.72/928.07 = 451.74/x
  3. Step 3: Cross multiply
    672.72x = 928.07 × 451.74
  4. Step 4: Simplify right side
    672.72x = 419,251.80
  5. Step 5: Solve for x
    x = 419,251.80/672.72
  6. Step 6: Final answer
    x = 623.22

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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.