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Finding the Fourth Proportional to 671.38, 1,008.87 and 586.72

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Solution

The fourth proportional to 671.38, 1,008.87 and 586.72 is: 881.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.38 : 1,008.87 = 586.72 : x
  2. Step 2: Convert to fraction form
    671.38/1,008.87 = 586.72/x
  3. Step 3: Cross multiply
    671.38x = 1,008.87 × 586.72
  4. Step 4: Simplify right side
    671.38x = 591,924.21
  5. Step 5: Solve for x
    x = 591,924.21/671.38
  6. Step 6: Final answer
    x = 881.65

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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.