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Finding the Fourth Proportional to 624.95, 861.78 and 376.22

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Solution

The fourth proportional to 624.95, 861.78 and 376.22 is: 518.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.95 : 861.78 = 376.22 : x
  2. Step 2: Convert to fraction form
    624.95/861.78 = 376.22/x
  3. Step 3: Cross multiply
    624.95x = 861.78 × 376.22
  4. Step 4: Simplify right side
    624.95x = 324,214.56
  5. Step 5: Solve for x
    x = 324,214.56/624.95
  6. Step 6: Final answer
    x = 518.79

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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.