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Finding the Fourth Proportional to 398,245.61, 597,146.98 and 131,860.81

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Solution

The fourth proportional to 398,245.61, 597,146.98 and 131,860.81 is: 197,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,245.61 : 597,146.98 = 131,860.81 : x
  2. Step 2: Convert to fraction form
    398,245.61/597,146.98 = 131,860.81/x
  3. Step 3: Cross multiply
    398,245.61x = 597,146.98 × 131,860.81
  4. Step 4: Simplify right side
    398,245.61x = 78,740,284,471.85
  5. Step 5: Solve for x
    x = 78,740,284,471.85/398,245.61
  6. Step 6: Final answer
    x = 197,717.90

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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.