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Finding the Fourth Proportional to 299,428.80, 449,143.20 and 269,904.30

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Solution

The fourth proportional to 299,428.80, 449,143.20 and 269,904.30 is: 404,856.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,428.80 : 449,143.20 = 269,904.30 : x
  2. Step 2: Convert to fraction form
    299,428.80/449,143.20 = 269,904.30/x
  3. Step 3: Cross multiply
    299,428.80x = 449,143.20 × 269,904.30
  4. Step 4: Simplify right side
    299,428.80x = 121,225,680,995.76
  5. Step 5: Solve for x
    x = 121,225,680,995.76/299,428.80
  6. Step 6: Final answer
    x = 404,856.45

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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.