Home / 494,141.12-681,987.90-312,869.92

Finding the Fourth Proportional to 494,141.12, 681,987.90 and 312,869.92

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Solution

The fourth proportional to 494,141.12, 681,987.90 and 312,869.92 is: 431,806.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,141.12 : 681,987.90 = 312,869.92 : x
  2. Step 2: Convert to fraction form
    494,141.12/681,987.90 = 312,869.92/x
  3. Step 3: Cross multiply
    494,141.12x = 681,987.90 × 312,869.92
  4. Step 4: Simplify right side
    494,141.12x = 213,373,499,713.97
  5. Step 5: Solve for x
    x = 213,373,499,713.97/494,141.12
  6. Step 6: Final answer
    x = 431,806.81

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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.