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Finding the Fourth Proportional to 517.79, 714.56 and 308.00

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Solution

The fourth proportional to 517.79, 714.56 and 308.00 is: 425.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.79 : 714.56 = 308.00 : x
  2. Step 2: Convert to fraction form
    517.79/714.56 = 308.00/x
  3. Step 3: Cross multiply
    517.79x = 714.56 × 308.00
  4. Step 4: Simplify right side
    517.79x = 220,084.73
  5. Step 5: Solve for x
    x = 220,084.73/517.79
  6. Step 6: Final answer
    x = 425.04

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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.