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Finding the Fourth Proportional to 517.43, 713.79 and 340.70

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Solution

The fourth proportional to 517.43, 713.79 and 340.70 is: 469.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.43 : 713.79 = 340.70 : x
  2. Step 2: Convert to fraction form
    517.43/713.79 = 340.70/x
  3. Step 3: Cross multiply
    517.43x = 713.79 × 340.70
  4. Step 4: Simplify right side
    517.43x = 243,184.68
  5. Step 5: Solve for x
    x = 243,184.68/517.43
  6. Step 6: Final answer
    x = 469.99

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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.