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Finding the Fourth Proportional to 637.77, 872.55 and 635.04

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Solution

The fourth proportional to 637.77, 872.55 and 635.04 is: 868.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.77 : 872.55 = 635.04 : x
  2. Step 2: Convert to fraction form
    637.77/872.55 = 635.04/x
  3. Step 3: Cross multiply
    637.77x = 872.55 × 635.04
  4. Step 4: Simplify right side
    637.77x = 554,104.15
  5. Step 5: Solve for x
    x = 554,104.15/637.77
  6. Step 6: Final answer
    x = 868.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.