Home / 861,061.45-1,290,892.34-300,489.61

Finding the Fourth Proportional to 861,061.45, 1,290,892.34 and 300,489.61

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Solution

The fourth proportional to 861,061.45, 1,290,892.34 and 300,489.61 is: 450,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,061.45 : 1,290,892.34 = 300,489.61 : x
  2. Step 2: Convert to fraction form
    861,061.45/1,290,892.34 = 300,489.61/x
  3. Step 3: Cross multiply
    861,061.45x = 1,290,892.34 × 300,489.61
  4. Step 4: Simplify right side
    861,061.45x = 387,899,734,296.14
  5. Step 5: Solve for x
    x = 387,899,734,296.14/861,061.45
  6. Step 6: Final answer
    x = 450,490.19

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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.