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Finding the Fourth Proportional to 261,067.80, 391,601.70 and 245,321.40

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Solution

The fourth proportional to 261,067.80, 391,601.70 and 245,321.40 is: 367,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,067.80 : 391,601.70 = 245,321.40 : x
  2. Step 2: Convert to fraction form
    261,067.80/391,601.70 = 245,321.40/x
  3. Step 3: Cross multiply
    261,067.80x = 391,601.70 × 245,321.40
  4. Step 4: Simplify right side
    261,067.80x = 96,068,277,286.38
  5. Step 5: Solve for x
    x = 96,068,277,286.38/261,067.80
  6. Step 6: Final answer
    x = 367,982.10

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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.