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Finding the Fourth Proportional to 932.42, 1,286.70 and 539.40

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Solution

The fourth proportional to 932.42, 1,286.70 and 539.40 is: 744.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.42 : 1,286.70 = 539.40 : x
  2. Step 2: Convert to fraction form
    932.42/1,286.70 = 539.40/x
  3. Step 3: Cross multiply
    932.42x = 1,286.70 × 539.40
  4. Step 4: Simplify right side
    932.42x = 694,045.98
  5. Step 5: Solve for x
    x = 694,045.98/932.42
  6. Step 6: Final answer
    x = 744.35

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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.