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Finding the Fourth Proportional to 398,993.76, 597,990.96 and 199,370.16

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Solution

The fourth proportional to 398,993.76, 597,990.96 and 199,370.16 is: 298,805.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,993.76 : 597,990.96 = 199,370.16 : x
  2. Step 2: Convert to fraction form
    398,993.76/597,990.96 = 199,370.16/x
  3. Step 3: Cross multiply
    398,993.76x = 597,990.96 × 199,370.16
  4. Step 4: Simplify right side
    398,993.76x = 119,221,553,373.75
  5. Step 5: Solve for x
    x = 119,221,553,373.75/398,993.76
  6. Step 6: Final answer
    x = 298,805.56

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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.