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Finding the Fourth Proportional to 207,289.20, 311,010.60 and 199,609.20

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Solution

The fourth proportional to 207,289.20, 311,010.60 and 199,609.20 is: 299,487.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,289.20 : 311,010.60 = 199,609.20 : x
  2. Step 2: Convert to fraction form
    207,289.20/311,010.60 = 199,609.20/x
  3. Step 3: Cross multiply
    207,289.20x = 311,010.60 × 199,609.20
  4. Step 4: Simplify right side
    207,289.20x = 62,080,577,057.52
  5. Step 5: Solve for x
    x = 62,080,577,057.52/207,289.20
  6. Step 6: Final answer
    x = 299,487.75

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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.