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Finding the Fourth Proportional to 932.36, 1,286.42 and 637.16

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Solution

The fourth proportional to 932.36, 1,286.42 and 637.16 is: 879.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.36 : 1,286.42 = 637.16 : x
  2. Step 2: Convert to fraction form
    932.36/1,286.42 = 637.16/x
  3. Step 3: Cross multiply
    932.36x = 1,286.42 × 637.16
  4. Step 4: Simplify right side
    932.36x = 819,655.37
  5. Step 5: Solve for x
    x = 819,655.37/932.36
  6. Step 6: Final answer
    x = 879.12

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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.