Home / 858,695.20-1,288,042.80-218,997.70

Finding the Fourth Proportional to 858,695.20, 1,288,042.80 and 218,997.70

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Solution

The fourth proportional to 858,695.20, 1,288,042.80 and 218,997.70 is: 328,496.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,695.20 : 1,288,042.80 = 218,997.70 : x
  2. Step 2: Convert to fraction form
    858,695.20/1,288,042.80 = 218,997.70/x
  3. Step 3: Cross multiply
    858,695.20x = 1,288,042.80 × 218,997.70
  4. Step 4: Simplify right side
    858,695.20x = 282,078,410,701.56
  5. Step 5: Solve for x
    x = 282,078,410,701.56/858,695.20
  6. Step 6: Final answer
    x = 328,496.55

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Similar ratio
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1.5x scale

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.