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Finding the Fourth Proportional to 639.17, 958.24 and 587.92

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Solution

The fourth proportional to 639.17, 958.24 and 587.92 is: 881.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.17 : 958.24 = 587.92 : x
  2. Step 2: Convert to fraction form
    639.17/958.24 = 587.92/x
  3. Step 3: Cross multiply
    639.17x = 958.24 × 587.92
  4. Step 4: Simplify right side
    639.17x = 563,368.46
  5. Step 5: Solve for x
    x = 563,368.46/639.17
  6. Step 6: Final answer
    x = 881.41

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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.