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Finding the Fourth Proportional to 521,062.20, 781,666.20 and 221,540.40

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Solution

The fourth proportional to 521,062.20, 781,666.20 and 221,540.40 is: 332,341.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,062.20 : 781,666.20 = 221,540.40 : x
  2. Step 2: Convert to fraction form
    521,062.20/781,666.20 = 221,540.40/x
  3. Step 3: Cross multiply
    521,062.20x = 781,666.20 × 221,540.40
  4. Step 4: Simplify right side
    521,062.20x = 173,170,642,614.48
  5. Step 5: Solve for x
    x = 173,170,642,614.48/521,062.20
  6. Step 6: Final answer
    x = 332,341.59

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1.5x scale

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.