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Finding the Fourth Proportional to 2,371.66, 3,557.08 and 639.88

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Solution

The fourth proportional to 2,371.66, 3,557.08 and 639.88 is: 959.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,371.66 : 3,557.08 = 639.88 : x
  2. Step 2: Convert to fraction form
    2,371.66/3,557.08 = 639.88/x
  3. Step 3: Cross multiply
    2,371.66x = 3,557.08 × 639.88
  4. Step 4: Simplify right side
    2,371.66x = 2,276,083.37
  5. Step 5: Solve for x
    x = 2,276,083.37/2,371.66
  6. Step 6: Final answer
    x = 959.70

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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.