Home / 458,237.20-687,528.60-221,789.20

Finding the Fourth Proportional to 458,237.20, 687,528.60 and 221,789.20

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Solution

The fourth proportional to 458,237.20, 687,528.60 and 221,789.20 is: 332,767.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,237.20 : 687,528.60 = 221,789.20 : x
  2. Step 2: Convert to fraction form
    458,237.20/687,528.60 = 221,789.20/x
  3. Step 3: Cross multiply
    458,237.20x = 687,528.60 × 221,789.20
  4. Step 4: Simplify right side
    458,237.20x = 152,486,418,171.12
  5. Step 5: Solve for x
    x = 152,486,418,171.12/458,237.20
  6. Step 6: Final answer
    x = 332,767.44

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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.