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Finding the Fourth Proportional to 672.29, 928.07 and 451.40

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Solution

The fourth proportional to 672.29, 928.07 and 451.40 is: 623.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.29 : 928.07 = 451.40 : x
  2. Step 2: Convert to fraction form
    672.29/928.07 = 451.40/x
  3. Step 3: Cross multiply
    672.29x = 928.07 × 451.40
  4. Step 4: Simplify right side
    672.29x = 418,927.29
  5. Step 5: Solve for x
    x = 418,927.29/672.29
  6. Step 6: Final answer
    x = 623.14

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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.