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Finding the Fourth Proportional to 609,145.20, 912,940.20 and 292,921.20

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Solution

The fourth proportional to 609,145.20, 912,940.20 and 292,921.20 is: 439,007.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,145.20 : 912,940.20 = 292,921.20 : x
  2. Step 2: Convert to fraction form
    609,145.20/912,940.20 = 292,921.20/x
  3. Step 3: Cross multiply
    609,145.20x = 912,940.20 × 292,921.20
  4. Step 4: Simplify right side
    609,145.20x = 267,419,538,912.24
  5. Step 5: Solve for x
    x = 267,419,538,912.24/609,145.20
  6. Step 6: Final answer
    x = 439,007.87

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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.