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Finding the Fourth Proportional to 398,888.56, 550,468.01 and 217,599.92

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Solution

The fourth proportional to 398,888.56, 550,468.01 and 217,599.92 is: 300,288.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,888.56 : 550,468.01 = 217,599.92 : x
  2. Step 2: Convert to fraction form
    398,888.56/550,468.01 = 217,599.92/x
  3. Step 3: Cross multiply
    398,888.56x = 550,468.01 × 217,599.92
  4. Step 4: Simplify right side
    398,888.56x = 119,781,794,938.56
  5. Step 5: Solve for x
    x = 119,781,794,938.56/398,888.56
  6. Step 6: Final answer
    x = 300,288.87

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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.