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Finding the Fourth Proportional to 624.24, 861.30 and 438.48

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Solution

The fourth proportional to 624.24, 861.30 and 438.48 is: 605.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.24 : 861.30 = 438.48 : x
  2. Step 2: Convert to fraction form
    624.24/861.30 = 438.48/x
  3. Step 3: Cross multiply
    624.24x = 861.30 × 438.48
  4. Step 4: Simplify right side
    624.24x = 377,662.82
  5. Step 5: Solve for x
    x = 377,662.82/624.24
  6. Step 6: Final answer
    x = 605.00

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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.