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Finding the Fourth Proportional to 882.69, 1,217.90 and 672.81

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Solution

The fourth proportional to 882.69, 1,217.90 and 672.81 is: 928.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.69 : 1,217.90 = 672.81 : x
  2. Step 2: Convert to fraction form
    882.69/1,217.90 = 672.81/x
  3. Step 3: Cross multiply
    882.69x = 1,217.90 × 672.81
  4. Step 4: Simplify right side
    882.69x = 819,411.93
  5. Step 5: Solve for x
    x = 819,411.93/882.69
  6. Step 6: Final answer
    x = 928.31

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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.