Home / 391,192.23-539,858.12-221,422.71

Finding the Fourth Proportional to 391,192.23, 539,858.12 and 221,422.71

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Solution

The fourth proportional to 391,192.23, 539,858.12 and 221,422.71 is: 305,570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,192.23 : 539,858.12 = 221,422.71 : x
  2. Step 2: Convert to fraction form
    391,192.23/539,858.12 = 221,422.71/x
  3. Step 3: Cross multiply
    391,192.23x = 539,858.12 × 221,422.71
  4. Step 4: Simplify right side
    391,192.23x = 119,536,846,838.79
  5. Step 5: Solve for x
    x = 119,536,846,838.79/391,192.23
  6. Step 6: Final answer
    x = 305,570.61

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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.