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Finding the Fourth Proportional to 939.19, 1,296.16 and 546.19

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Solution

The fourth proportional to 939.19, 1,296.16 and 546.19 is: 753.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.19 : 1,296.16 = 546.19 : x
  2. Step 2: Convert to fraction form
    939.19/1,296.16 = 546.19/x
  3. Step 3: Cross multiply
    939.19x = 1,296.16 × 546.19
  4. Step 4: Simplify right side
    939.19x = 707,948.10
  5. Step 5: Solve for x
    x = 707,948.10/939.19
  6. Step 6: Final answer
    x = 753.79

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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.