Home / 861,092.64-1,290,939.12-300,520.80

Finding the Fourth Proportional to 861,092.64, 1,290,939.12 and 300,520.80

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Solution

The fourth proportional to 861,092.64, 1,290,939.12 and 300,520.80 is: 450,536.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,092.64 : 1,290,939.12 = 300,520.80 : x
  2. Step 2: Convert to fraction form
    861,092.64/1,290,939.12 = 300,520.80/x
  3. Step 3: Cross multiply
    861,092.64x = 1,290,939.12 × 300,520.80
  4. Step 4: Simplify right side
    861,092.64x = 387,954,057,093.70
  5. Step 5: Solve for x
    x = 387,954,057,093.70/861,092.64
  6. Step 6: Final answer
    x = 450,536.96

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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.