Home / 861,400.89-1,292,136.96-254,189.21

Finding the Fourth Proportional to 861,400.89, 1,292,136.96 and 254,189.21

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Solution

The fourth proportional to 861,400.89, 1,292,136.96 and 254,189.21 is: 381,294.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,400.89 : 1,292,136.96 = 254,189.21 : x
  2. Step 2: Convert to fraction form
    861,400.89/1,292,136.96 = 254,189.21/x
  3. Step 3: Cross multiply
    861,400.89x = 1,292,136.96 × 254,189.21
  4. Step 4: Simplify right side
    861,400.89x = 328,447,265,978.04
  5. Step 5: Solve for x
    x = 328,447,265,978.04/861,400.89
  6. Step 6: Final answer
    x = 381,294.32

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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.