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Finding the Fourth Proportional to 431,679.80, 647,519.70 and 241,945.40

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Solution

The fourth proportional to 431,679.80, 647,519.70 and 241,945.40 is: 362,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,679.80 : 647,519.70 = 241,945.40 : x
  2. Step 2: Convert to fraction form
    431,679.80/647,519.70 = 241,945.40/x
  3. Step 3: Cross multiply
    431,679.80x = 647,519.70 × 241,945.40
  4. Step 4: Simplify right side
    431,679.80x = 156,664,412,824.38
  5. Step 5: Solve for x
    x = 156,664,412,824.38/431,679.80
  6. Step 6: Final answer
    x = 362,918.10

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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.