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Finding the Fourth Proportional to 517.79, 714.32 and 351.95

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Solution

The fourth proportional to 517.79, 714.32 and 351.95 is: 485.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.79 : 714.32 = 351.95 : x
  2. Step 2: Convert to fraction form
    517.79/714.32 = 351.95/x
  3. Step 3: Cross multiply
    517.79x = 714.32 × 351.95
  4. Step 4: Simplify right side
    517.79x = 251,400.91
  5. Step 5: Solve for x
    x = 251,400.91/517.79
  6. Step 6: Final answer
    x = 485.52

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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.