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Finding the Fourth Proportional to 322,438.88, 483,657.74 and 85,781.56

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Solution

The fourth proportional to 322,438.88, 483,657.74 and 85,781.56 is: 128,672.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,438.88 : 483,657.74 = 85,781.56 : x
  2. Step 2: Convert to fraction form
    322,438.88/483,657.74 = 85,781.56/x
  3. Step 3: Cross multiply
    322,438.88x = 483,657.74 × 85,781.56
  4. Step 4: Simplify right side
    322,438.88x = 41,488,915,443.27
  5. Step 5: Solve for x
    x = 41,488,915,443.27/322,438.88
  6. Step 6: Final answer
    x = 128,672.19

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1.5x scale

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.