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Finding the Fourth Proportional to 625.31, 862.93 and 349.31

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Solution

The fourth proportional to 625.31, 862.93 and 349.31 is: 482.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.31 : 862.93 = 349.31 : x
  2. Step 2: Convert to fraction form
    625.31/862.93 = 349.31/x
  3. Step 3: Cross multiply
    625.31x = 862.93 × 349.31
  4. Step 4: Simplify right side
    625.31x = 301,432.67
  5. Step 5: Solve for x
    x = 301,432.67/625.31
  6. Step 6: Final answer
    x = 482.05

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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.