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Finding the Fourth Proportional to 260,000.20, 389,344.20 and 207,512.20

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Solution

The fourth proportional to 260,000.20, 389,344.20 and 207,512.20 is: 310,744.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,000.20 : 389,344.20 = 207,512.20 : x
  2. Step 2: Convert to fraction form
    260,000.20/389,344.20 = 207,512.20/x
  3. Step 3: Cross multiply
    260,000.20x = 389,344.20 × 207,512.20
  4. Step 4: Simplify right side
    260,000.20x = 80,793,671,499.24
  5. Step 5: Solve for x
    x = 80,793,671,499.24/260,000.20
  6. Step 6: Final answer
    x = 310,744.65

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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.