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Finding the Fourth Proportional to 259,744.20, 388,960.20 and 207,256.20

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Solution

The fourth proportional to 259,744.20, 388,960.20 and 207,256.20 is: 310,360.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,744.20 : 388,960.20 = 207,256.20 : x
  2. Step 2: Convert to fraction form
    259,744.20/388,960.20 = 207,256.20/x
  3. Step 3: Cross multiply
    259,744.20x = 388,960.20 × 207,256.20
  4. Step 4: Simplify right side
    259,744.20x = 80,614,413,003.24
  5. Step 5: Solve for x
    x = 80,614,413,003.24/259,744.20
  6. Step 6: Final answer
    x = 310,360.78

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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.