Home / 861,488.78-1,188,854.43-479,507.36

Finding the Fourth Proportional to 861,488.78, 1,188,854.43 and 479,507.36

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Solution

The fourth proportional to 861,488.78, 1,188,854.43 and 479,507.36 is: 661,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,488.78 : 1,188,854.43 = 479,507.36 : x
  2. Step 2: Convert to fraction form
    861,488.78/1,188,854.43 = 479,507.36/x
  3. Step 3: Cross multiply
    861,488.78x = 1,188,854.43 × 479,507.36
  4. Step 4: Simplify right side
    861,488.78x = 570,064,449,153.61
  5. Step 5: Solve for x
    x = 570,064,449,153.61/861,488.78
  6. Step 6: Final answer
    x = 661,720.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.