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Finding the Fourth Proportional to 939.59, 1,296.74 and 546.83

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Solution

The fourth proportional to 939.59, 1,296.74 and 546.83 is: 754.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.59 : 1,296.74 = 546.83 : x
  2. Step 2: Convert to fraction form
    939.59/1,296.74 = 546.83/x
  3. Step 3: Cross multiply
    939.59x = 1,296.74 × 546.83
  4. Step 4: Simplify right side
    939.59x = 709,093.60
  5. Step 5: Solve for x
    x = 709,093.60/939.59
  6. Step 6: Final answer
    x = 754.68

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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.