Home / 858,109.20-1,287,163.80-218,411.70

Finding the Fourth Proportional to 858,109.20, 1,287,163.80 and 218,411.70

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Solution

The fourth proportional to 858,109.20, 1,287,163.80 and 218,411.70 is: 327,617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,109.20 : 1,287,163.80 = 218,411.70 : x
  2. Step 2: Convert to fraction form
    858,109.20/1,287,163.80 = 218,411.70/x
  3. Step 3: Cross multiply
    858,109.20x = 1,287,163.80 × 218,411.70
  4. Step 4: Simplify right side
    858,109.20x = 281,131,633,736.46
  5. Step 5: Solve for x
    x = 281,131,633,736.46/858,109.20
  6. Step 6: Final answer
    x = 327,617.55

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Double scale
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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.