Home / 391,143.20-539,687.16-261,847.76

Finding the Fourth Proportional to 391,143.20, 539,687.16 and 261,847.76

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Solution

The fourth proportional to 391,143.20, 539,687.16 and 261,847.76 is: 361,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,143.20 : 539,687.16 = 261,847.76 : x
  2. Step 2: Convert to fraction form
    391,143.20/539,687.16 = 261,847.76/x
  3. Step 3: Cross multiply
    391,143.20x = 539,687.16 × 261,847.76
  4. Step 4: Simplify right side
    391,143.20x = 141,315,873,946.76
  5. Step 5: Solve for x
    x = 141,315,873,946.76/391,143.20
  6. Step 6: Final answer
    x = 361,289.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.