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Finding the Fourth Proportional to 343.65, 517.53 and 311.52

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Solution

The fourth proportional to 343.65, 517.53 and 311.52 is: 469.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.65 : 517.53 = 311.52 : x
  2. Step 2: Convert to fraction form
    343.65/517.53 = 311.52/x
  3. Step 3: Cross multiply
    343.65x = 517.53 × 311.52
  4. Step 4: Simplify right side
    343.65x = 161,220.95
  5. Step 5: Solve for x
    x = 161,220.95/343.65
  6. Step 6: Final answer
    x = 469.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.