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Finding the Fourth Proportional to 625.20, 862.72 and 376.44

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Solution

The fourth proportional to 625.20, 862.72 and 376.44 is: 519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.20 : 862.72 = 376.44 : x
  2. Step 2: Convert to fraction form
    625.20/862.72 = 376.44/x
  3. Step 3: Cross multiply
    625.20x = 862.72 × 376.44
  4. Step 4: Simplify right side
    625.20x = 324,762.32
  5. Step 5: Solve for x
    x = 324,762.32/625.20
  6. Step 6: Final answer
    x = 519.45

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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.