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Finding the Fourth Proportional to 939.58, 1,296.78 and 546.83

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Solution

The fourth proportional to 939.58, 1,296.78 and 546.83 is: 754.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.58 : 1,296.78 = 546.83 : x
  2. Step 2: Convert to fraction form
    939.58/1,296.78 = 546.83/x
  3. Step 3: Cross multiply
    939.58x = 1,296.78 × 546.83
  4. Step 4: Simplify right side
    939.58x = 709,118.21
  5. Step 5: Solve for x
    x = 709,118.21/939.58
  6. Step 6: Final answer
    x = 754.72

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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.