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Finding the Fourth Proportional to 881.91, 1,217.18 and 671.75

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Solution

The fourth proportional to 881.91, 1,217.18 and 671.75 is: 927.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.91 : 1,217.18 = 671.75 : x
  2. Step 2: Convert to fraction form
    881.91/1,217.18 = 671.75/x
  3. Step 3: Cross multiply
    881.91x = 1,217.18 × 671.75
  4. Step 4: Simplify right side
    881.91x = 817,640.67
  5. Step 5: Solve for x
    x = 817,640.67/881.91
  6. Step 6: Final answer
    x = 927.12

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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.