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Finding the Fourth Proportional to 672.20, 927.96 and 451.51

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Solution

The fourth proportional to 672.20, 927.96 and 451.51 is: 623.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.20 : 927.96 = 451.51 : x
  2. Step 2: Convert to fraction form
    672.20/927.96 = 451.51/x
  3. Step 3: Cross multiply
    672.20x = 927.96 × 451.51
  4. Step 4: Simplify right side
    672.20x = 418,979.21
  5. Step 5: Solve for x
    x = 418,979.21/672.20
  6. Step 6: Final answer
    x = 623.30

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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.