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Finding the Fourth Proportional to 270,211.20, 405,339.30 and 80,659.05

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Solution

The fourth proportional to 270,211.20, 405,339.30 and 80,659.05 is: 120,995.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,211.20 : 405,339.30 = 80,659.05 : x
  2. Step 2: Convert to fraction form
    270,211.20/405,339.30 = 80,659.05/x
  3. Step 3: Cross multiply
    270,211.20x = 405,339.30 × 80,659.05
  4. Step 4: Simplify right side
    270,211.20x = 32,694,282,865.67
  5. Step 5: Solve for x
    x = 32,694,282,865.67/270,211.20
  6. Step 6: Final answer
    x = 120,995.29

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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.