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Finding the Fourth Proportional to 438,601.11, 657,371.52 and 213,624.42

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Solution

The fourth proportional to 438,601.11, 657,371.52 and 213,624.42 is: 320,178.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,601.11 : 657,371.52 = 213,624.42 : x
  2. Step 2: Convert to fraction form
    438,601.11/657,371.52 = 213,624.42/x
  3. Step 3: Cross multiply
    438,601.11x = 657,371.52 × 213,624.42
  4. Step 4: Simplify right side
    438,601.11x = 140,430,611,517.91
  5. Step 5: Solve for x
    x = 140,430,611,517.91/438,601.11
  6. Step 6: Final answer
    x = 320,178.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.