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Finding the Fourth Proportional to 2,283.32, 3,425.17 and 639.87

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Solution

The fourth proportional to 2,283.32, 3,425.17 and 639.87 is: 959.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,283.32 : 3,425.17 = 639.87 : x
  2. Step 2: Convert to fraction form
    2,283.32/3,425.17 = 639.87/x
  3. Step 3: Cross multiply
    2,283.32x = 3,425.17 × 639.87
  4. Step 4: Simplify right side
    2,283.32x = 2,191,663.53
  5. Step 5: Solve for x
    x = 2,191,663.53/2,283.32
  6. Step 6: Final answer
    x = 959.86

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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.