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Finding the Fourth Proportional to 713.48, 984.61 and 418.75

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Solution

The fourth proportional to 713.48, 984.61 and 418.75 is: 577.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.48 : 984.61 = 418.75 : x
  2. Step 2: Convert to fraction form
    713.48/984.61 = 418.75/x
  3. Step 3: Cross multiply
    713.48x = 984.61 × 418.75
  4. Step 4: Simplify right side
    713.48x = 412,301.93
  5. Step 5: Solve for x
    x = 412,301.93/713.48
  6. Step 6: Final answer
    x = 577.88

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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.