Home / 458,195.20-687,357.60-142,619.20

Finding the Fourth Proportional to 458,195.20, 687,357.60 and 142,619.20

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Solution

The fourth proportional to 458,195.20, 687,357.60 and 142,619.20 is: 213,948.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,195.20 : 687,357.60 = 142,619.20 : x
  2. Step 2: Convert to fraction form
    458,195.20/687,357.60 = 142,619.20/x
  3. Step 3: Cross multiply
    458,195.20x = 687,357.60 × 142,619.20
  4. Step 4: Simplify right side
    458,195.20x = 98,030,391,025.92
  5. Step 5: Solve for x
    x = 98,030,391,025.92/458,195.20
  6. Step 6: Final answer
    x = 213,948.97

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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.