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Finding the Fourth Proportional to 437,620.80, 656,042.40 and 259,939.20

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Solution

The fourth proportional to 437,620.80, 656,042.40 and 259,939.20 is: 389,677.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,620.80 : 656,042.40 = 259,939.20 : x
  2. Step 2: Convert to fraction form
    437,620.80/656,042.40 = 259,939.20/x
  3. Step 3: Cross multiply
    437,620.80x = 656,042.40 × 259,939.20
  4. Step 4: Simplify right side
    437,620.80x = 170,531,136,622.08
  5. Step 5: Solve for x
    x = 170,531,136,622.08/437,620.80
  6. Step 6: Final answer
    x = 389,677.86

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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.