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Finding the Fourth Proportional to 349,760.80, 525,169.20 and 279,431.20

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Solution

The fourth proportional to 349,760.80, 525,169.20 and 279,431.20 is: 419,568.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,760.80 : 525,169.20 = 279,431.20 : x
  2. Step 2: Convert to fraction form
    349,760.80/525,169.20 = 279,431.20/x
  3. Step 3: Cross multiply
    349,760.80x = 525,169.20 × 279,431.20
  4. Step 4: Simplify right side
    349,760.80x = 146,748,659,759.04
  5. Step 5: Solve for x
    x = 146,748,659,759.04/349,760.80
  6. Step 6: Final answer
    x = 419,568.63

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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.