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Finding the Fourth Proportional to 625.31, 862.98 and 345.57

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Solution

The fourth proportional to 625.31, 862.98 and 345.57 is: 476.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.31 : 862.98 = 345.57 : x
  2. Step 2: Convert to fraction form
    625.31/862.98 = 345.57/x
  3. Step 3: Cross multiply
    625.31x = 862.98 × 345.57
  4. Step 4: Simplify right side
    625.31x = 298,220.00
  5. Step 5: Solve for x
    x = 298,220.00/625.31
  6. Step 6: Final answer
    x = 476.92

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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.