Home / 861,120.72-1,290,837.87-320,981.54

Finding the Fourth Proportional to 861,120.72, 1,290,837.87 and 320,981.54

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Solution

The fourth proportional to 861,120.72, 1,290,837.87 and 320,981.54 is: 481,158.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,120.72 : 1,290,837.87 = 320,981.54 : x
  2. Step 2: Convert to fraction form
    861,120.72/1,290,837.87 = 320,981.54/x
  3. Step 3: Cross multiply
    861,120.72x = 1,290,837.87 × 320,981.54
  4. Step 4: Simplify right side
    861,120.72x = 414,335,120,948.73
  5. Step 5: Solve for x
    x = 414,335,120,948.73/861,120.72
  6. Step 6: Final answer
    x = 481,158.00

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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.