Home / 858,009.20-1,287,013.80-218,311.70

Finding the Fourth Proportional to 858,009.20, 1,287,013.80 and 218,311.70

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Solution

The fourth proportional to 858,009.20, 1,287,013.80 and 218,311.70 is: 327,467.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,009.20 : 1,287,013.80 = 218,311.70 : x
  2. Step 2: Convert to fraction form
    858,009.20/1,287,013.80 = 218,311.70/x
  3. Step 3: Cross multiply
    858,009.20x = 1,287,013.80 × 218,311.70
  4. Step 4: Simplify right side
    858,009.20x = 280,970,170,601.46
  5. Step 5: Solve for x
    x = 280,970,170,601.46/858,009.20
  6. Step 6: Final answer
    x = 327,467.55

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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.