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Finding the Fourth Proportional to 517.95, 714.49 and 307.92

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Solution

The fourth proportional to 517.95, 714.49 and 307.92 is: 424.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.95 : 714.49 = 307.92 : x
  2. Step 2: Convert to fraction form
    517.95/714.49 = 307.92/x
  3. Step 3: Cross multiply
    517.95x = 714.49 × 307.92
  4. Step 4: Simplify right side
    517.95x = 220,005.76
  5. Step 5: Solve for x
    x = 220,005.76/517.95
  6. Step 6: Final answer
    x = 424.76

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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.