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Finding the Fourth Proportional to 679.05, 938.70 and 547.83

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Solution

The fourth proportional to 679.05, 938.70 and 547.83 is: 757.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.05 : 938.70 = 547.83 : x
  2. Step 2: Convert to fraction form
    679.05/938.70 = 547.83/x
  3. Step 3: Cross multiply
    679.05x = 938.70 × 547.83
  4. Step 4: Simplify right side
    679.05x = 514,248.02
  5. Step 5: Solve for x
    x = 514,248.02/679.05
  6. Step 6: Final answer
    x = 757.31

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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.