Home / 457,155.88-685,679.20-120,222.78

Finding the Fourth Proportional to 457,155.88, 685,679.20 and 120,222.78

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Solution

The fourth proportional to 457,155.88, 685,679.20 and 120,222.78 is: 180,319.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,155.88 : 685,679.20 = 120,222.78 : x
  2. Step 2: Convert to fraction form
    457,155.88/685,679.20 = 120,222.78/x
  3. Step 3: Cross multiply
    457,155.88x = 685,679.20 × 120,222.78
  4. Step 4: Simplify right side
    457,155.88x = 82,434,259,612.18
  5. Step 5: Solve for x
    x = 82,434,259,612.18/457,155.88
  6. Step 6: Final answer
    x = 180,319.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.