Home / 391,862,480.65-540,770,311.92-215,650,476.03

Finding the Fourth Proportional to 391,862,480.65, 540,770,311.92 and 215,650,476.03

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Solution

The fourth proportional to 391,862,480.65, 540,770,311.92 and 215,650,476.03 is: 297,597,705.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,862,480.65 : 540,770,311.92 = 215,650,476.03 : x
  2. Step 2: Convert to fraction form
    391,862,480.65/540,770,311.92 = 215,650,476.03/x
  3. Step 3: Cross multiply
    391,862,480.65x = 540,770,311.92 × 215,650,476.03
  4. Step 4: Simplify right side
    391,862,480.65x = 116,617,375,188,439,568
  5. Step 5: Solve for x
    x = 116,617,375,188,439,568/391,862,480.65
  6. Step 6: Final answer
    x = 297,597,705.69

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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.