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Finding the Fourth Proportional to 882.91, 1,218.51 and 672.70

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Solution

The fourth proportional to 882.91, 1,218.51 and 672.70 is: 928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.91 : 1,218.51 = 672.70 : x
  2. Step 2: Convert to fraction form
    882.91/1,218.51 = 672.70/x
  3. Step 3: Cross multiply
    882.91x = 1,218.51 × 672.70
  4. Step 4: Simplify right side
    882.91x = 819,691.68
  5. Step 5: Solve for x
    x = 819,691.68/882.91
  6. Step 6: Final answer
    x = 928.40

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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.