Home / 521,129.20-781,110.60-221,558.80

Finding the Fourth Proportional to 521,129.20, 781,110.60 and 221,558.80

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Solution

The fourth proportional to 521,129.20, 781,110.60 and 221,558.80 is: 332,090.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,129.20 : 781,110.60 = 221,558.80 : x
  2. Step 2: Convert to fraction form
    521,129.20/781,110.60 = 221,558.80/x
  3. Step 3: Cross multiply
    521,129.20x = 781,110.60 × 221,558.80
  4. Step 4: Simplify right side
    521,129.20x = 173,061,927,203.28
  5. Step 5: Solve for x
    x = 173,061,927,203.28/521,129.20
  6. Step 6: Final answer
    x = 332,090.25

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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.