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Finding the Fourth Proportional to 625.70, 862.70 and 520.94

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Solution

The fourth proportional to 625.70, 862.70 and 520.94 is: 718.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.70 : 862.70 = 520.94 : x
  2. Step 2: Convert to fraction form
    625.70/862.70 = 520.94/x
  3. Step 3: Cross multiply
    625.70x = 862.70 × 520.94
  4. Step 4: Simplify right side
    625.70x = 449,414.94
  5. Step 5: Solve for x
    x = 449,414.94/625.70
  6. Step 6: Final answer
    x = 718.26

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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.