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Finding the Fourth Proportional to 517.39, 714.04 and 307.46

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Solution

The fourth proportional to 517.39, 714.04 and 307.46 is: 424.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.39 : 714.04 = 307.46 : x
  2. Step 2: Convert to fraction form
    517.39/714.04 = 307.46/x
  3. Step 3: Cross multiply
    517.39x = 714.04 × 307.46
  4. Step 4: Simplify right side
    517.39x = 219,537.61
  5. Step 5: Solve for x
    x = 219,537.61/517.39
  6. Step 6: Final answer
    x = 424.32

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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.