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Finding the Fourth Proportional to 624.69, 862.11 and 376.20

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Solution

The fourth proportional to 624.69, 862.11 and 376.20 is: 519.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.69 : 862.11 = 376.20 : x
  2. Step 2: Convert to fraction form
    624.69/862.11 = 376.20/x
  3. Step 3: Cross multiply
    624.69x = 862.11 × 376.20
  4. Step 4: Simplify right side
    624.69x = 324,325.78
  5. Step 5: Solve for x
    x = 324,325.78/624.69
  6. Step 6: Final answer
    x = 519.18

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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.