Home / 391,023.27-539,623.49-221,253.75

Finding the Fourth Proportional to 391,023.27, 539,623.49 and 221,253.75

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Solution

The fourth proportional to 391,023.27, 539,623.49 and 221,253.75 is: 305,336.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,023.27 : 539,623.49 = 221,253.75 : x
  2. Step 2: Convert to fraction form
    391,023.27/539,623.49 = 221,253.75/x
  3. Step 3: Cross multiply
    391,023.27x = 539,623.49 × 221,253.75
  4. Step 4: Simplify right side
    391,023.27x = 119,393,719,644.32
  5. Step 5: Solve for x
    x = 119,393,719,644.32/391,023.27
  6. Step 6: Final answer
    x = 305,336.61

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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.