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Finding the Fourth Proportional to 259,731.20, 389,596.80 and 166,419.20

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Solution

The fourth proportional to 259,731.20, 389,596.80 and 166,419.20 is: 249,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,731.20 : 389,596.80 = 166,419.20 : x
  2. Step 2: Convert to fraction form
    259,731.20/389,596.80 = 166,419.20/x
  3. Step 3: Cross multiply
    259,731.20x = 389,596.80 × 166,419.20
  4. Step 4: Simplify right side
    259,731.20x = 64,836,387,778.56
  5. Step 5: Solve for x
    x = 64,836,387,778.56/259,731.20
  6. Step 6: Final answer
    x = 249,628.80

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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.