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Finding the Fourth Proportional to 263,254.68, 394,881.72 and 85,761.42

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Solution

The fourth proportional to 263,254.68, 394,881.72 and 85,761.42 is: 128,642.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,254.68 : 394,881.72 = 85,761.42 : x
  2. Step 2: Convert to fraction form
    263,254.68/394,881.72 = 85,761.42/x
  3. Step 3: Cross multiply
    263,254.68x = 394,881.72 × 85,761.42
  4. Step 4: Simplify right side
    263,254.68x = 33,865,617,039.24
  5. Step 5: Solve for x
    x = 33,865,617,039.24/263,254.68
  6. Step 6: Final answer
    x = 128,642.03

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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.