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Finding the Fourth Proportional to 398,886.56, 550,465.25 and 217,597.92

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Solution

The fourth proportional to 398,886.56, 550,465.25 and 217,597.92 is: 300,286.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,886.56 : 550,465.25 = 217,597.92 : x
  2. Step 2: Convert to fraction form
    398,886.56/550,465.25 = 217,597.92/x
  3. Step 3: Cross multiply
    398,886.56x = 550,465.25 × 217,597.92
  4. Step 4: Simplify right side
    398,886.56x = 119,780,092,344.29
  5. Step 5: Solve for x
    x = 119,780,092,344.29/398,886.56
  6. Step 6: Final answer
    x = 300,286.11

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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.