Home / 391,150.25-539,694.79-221,384.38

Finding the Fourth Proportional to 391,150.25, 539,694.79 and 221,384.38

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Solution

The fourth proportional to 391,150.25, 539,694.79 and 221,384.38 is: 305,458.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,150.25 : 539,694.79 = 221,384.38 : x
  2. Step 2: Convert to fraction form
    391,150.25/539,694.79 = 221,384.38/x
  3. Step 3: Cross multiply
    391,150.25x = 539,694.79 × 221,384.38
  4. Step 4: Simplify right side
    391,150.25x = 119,479,996,473.38
  5. Step 5: Solve for x
    x = 119,479,996,473.38/391,150.25
  6. Step 6: Final answer
    x = 305,458.06

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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.