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Finding the Fourth Proportional to 2,698.13, 4,047.20 and 849.20

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Solution

The fourth proportional to 2,698.13, 4,047.20 and 849.20 is: 1,273.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,698.13 : 4,047.20 = 849.20 : x
  2. Step 2: Convert to fraction form
    2,698.13/4,047.20 = 849.20/x
  3. Step 3: Cross multiply
    2,698.13x = 4,047.20 × 849.20
  4. Step 4: Simplify right side
    2,698.13x = 3,436,857.76
  5. Step 5: Solve for x
    x = 3,436,857.76/2,698.13
  6. Step 6: Final answer
    x = 1,273.79

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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.