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Finding the Fourth Proportional to 257,941.80, 386,912.70 and 80,448.53

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Solution

The fourth proportional to 257,941.80, 386,912.70 and 80,448.53 is: 120,672.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,941.80 : 386,912.70 = 80,448.53 : x
  2. Step 2: Convert to fraction form
    257,941.80/386,912.70 = 80,448.53/x
  3. Step 3: Cross multiply
    257,941.80x = 386,912.70 × 80,448.53
  4. Step 4: Simplify right side
    257,941.80x = 31,126,556,018.77
  5. Step 5: Solve for x
    x = 31,126,556,018.77/257,941.80
  6. Step 6: Final answer
    x = 120,672.79

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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.