Home / 458,205.20-687,372.60-142,629.20

Finding the Fourth Proportional to 458,205.20, 687,372.60 and 142,629.20

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Solution

The fourth proportional to 458,205.20, 687,372.60 and 142,629.20 is: 213,963.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,205.20 : 687,372.60 = 142,629.20 : x
  2. Step 2: Convert to fraction form
    458,205.20/687,372.60 = 142,629.20/x
  3. Step 3: Cross multiply
    458,205.20x = 687,372.60 × 142,629.20
  4. Step 4: Simplify right side
    458,205.20x = 98,039,404,039.92
  5. Step 5: Solve for x
    x = 98,039,404,039.92/458,205.20
  6. Step 6: Final answer
    x = 213,963.97

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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.