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Finding the Fourth Proportional to 939.42, 1,296.36 and 546.30

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Solution

The fourth proportional to 939.42, 1,296.36 and 546.30 is: 753.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.42 : 1,296.36 = 546.30 : x
  2. Step 2: Convert to fraction form
    939.42/1,296.36 = 546.30/x
  3. Step 3: Cross multiply
    939.42x = 1,296.36 × 546.30
  4. Step 4: Simplify right side
    939.42x = 708,201.47
  5. Step 5: Solve for x
    x = 708,201.47/939.42
  6. Step 6: Final answer
    x = 753.87

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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.