Home / 391,862,479.15-540,770,309.85-215,650,474.53

Finding the Fourth Proportional to 391,862,479.15, 540,770,309.85 and 215,650,474.53

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Solution

The fourth proportional to 391,862,479.15, 540,770,309.85 and 215,650,474.53 is: 297,597,703.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,862,479.15 : 540,770,309.85 = 215,650,474.53 : x
  2. Step 2: Convert to fraction form
    391,862,479.15/540,770,309.85 = 215,650,474.53/x
  3. Step 3: Cross multiply
    391,862,479.15x = 540,770,309.85 × 215,650,474.53
  4. Step 4: Simplify right side
    391,862,479.15x = 116,617,373,930,887,632
  5. Step 5: Solve for x
    x = 116,617,373,930,887,632/391,862,479.15
  6. Step 6: Final answer
    x = 297,597,703.62

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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.