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Finding the Fourth Proportional to 713.60, 985.56 and 679.04

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Solution

The fourth proportional to 713.60, 985.56 and 679.04 is: 937.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.60 : 985.56 = 679.04 : x
  2. Step 2: Convert to fraction form
    713.60/985.56 = 679.04/x
  3. Step 3: Cross multiply
    713.60x = 985.56 × 679.04
  4. Step 4: Simplify right side
    713.60x = 669,234.66
  5. Step 5: Solve for x
    x = 669,234.66/713.60
  6. Step 6: Final answer
    x = 937.83

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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.