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Finding the Fourth Proportional to 932.28, 1,285.80 and 637.08

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Solution

The fourth proportional to 932.28, 1,285.80 and 637.08 is: 878.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.28 : 1,285.80 = 637.08 : x
  2. Step 2: Convert to fraction form
    932.28/1,285.80 = 637.08/x
  3. Step 3: Cross multiply
    932.28x = 1,285.80 × 637.08
  4. Step 4: Simplify right side
    932.28x = 819,157.46
  5. Step 5: Solve for x
    x = 819,157.46/932.28
  6. Step 6: Final answer
    x = 878.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.