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Finding the Fourth Proportional to 655,144.80, 981,887.60 and 318,262.56

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Solution

The fourth proportional to 655,144.80, 981,887.60 and 318,262.56 is: 476,990.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,144.80 : 981,887.60 = 318,262.56 : x
  2. Step 2: Convert to fraction form
    655,144.80/981,887.60 = 318,262.56/x
  3. Step 3: Cross multiply
    655,144.80x = 981,887.60 × 318,262.56
  4. Step 4: Simplify right side
    655,144.80x = 312,498,061,208.26
  5. Step 5: Solve for x
    x = 312,498,061,208.26/655,144.80
  6. Step 6: Final answer
    x = 476,990.83

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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.