Home / 521,512.20-781,685.10-221,941.80

Finding the Fourth Proportional to 521,512.20, 781,685.10 and 221,941.80

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Solution

The fourth proportional to 521,512.20, 781,685.10 and 221,941.80 is: 332,664.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,512.20 : 781,685.10 = 221,941.80 : x
  2. Step 2: Convert to fraction form
    521,512.20/781,685.10 = 221,941.80/x
  3. Step 3: Cross multiply
    521,512.20x = 781,685.10 × 221,941.80
  4. Step 4: Simplify right side
    521,512.20x = 173,488,598,127.18
  5. Step 5: Solve for x
    x = 173,488,598,127.18/521,512.20
  6. Step 6: Final answer
    x = 332,664.51

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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.