Home / 427,110.80-639,791.40-216,867.20

Finding the Fourth Proportional to 427,110.80, 639,791.40 and 216,867.20

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Solution

The fourth proportional to 427,110.80, 639,791.40 and 216,867.20 is: 324,856.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,110.80 : 639,791.40 = 216,867.20 : x
  2. Step 2: Convert to fraction form
    427,110.80/639,791.40 = 216,867.20/x
  3. Step 3: Cross multiply
    427,110.80x = 639,791.40 × 216,867.20
  4. Step 4: Simplify right side
    427,110.80x = 138,749,769,502.08
  5. Step 5: Solve for x
    x = 138,749,769,502.08/427,110.80
  6. Step 6: Final answer
    x = 324,856.62

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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.