Home / 861,791.78-1,292,132.42-412,501.80

Finding the Fourth Proportional to 861,791.78, 1,292,132.42 and 412,501.80

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Solution

The fourth proportional to 861,791.78, 1,292,132.42 and 412,501.80 is: 618,486.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,791.78 : 1,292,132.42 = 412,501.80 : x
  2. Step 2: Convert to fraction form
    861,791.78/1,292,132.42 = 412,501.80/x
  3. Step 3: Cross multiply
    861,791.78x = 1,292,132.42 × 412,501.80
  4. Step 4: Simplify right side
    861,791.78x = 533,006,949,088.36
  5. Step 5: Solve for x
    x = 533,006,949,088.36/861,791.78
  6. Step 6: Final answer
    x = 618,486.93

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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.