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Finding the Fourth Proportional to 881.39, 1,320.98 and 671.59

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Solution

The fourth proportional to 881.39, 1,320.98 and 671.59 is: 1,006.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.39 : 1,320.98 = 671.59 : x
  2. Step 2: Convert to fraction form
    881.39/1,320.98 = 671.59/x
  3. Step 3: Cross multiply
    881.39x = 1,320.98 × 671.59
  4. Step 4: Simplify right side
    881.39x = 887,156.96
  5. Step 5: Solve for x
    x = 887,156.96/881.39
  6. Step 6: Final answer
    x = 1,006.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.