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Finding the Fourth Proportional to 2,747.65, 4,121.06 and 898.78

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Solution

The fourth proportional to 2,747.65, 4,121.06 and 898.78 is: 1,348.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.65 : 4,121.06 = 898.78 : x
  2. Step 2: Convert to fraction form
    2,747.65/4,121.06 = 898.78/x
  3. Step 3: Cross multiply
    2,747.65x = 4,121.06 × 898.78
  4. Step 4: Simplify right side
    2,747.65x = 3,703,901.21
  5. Step 5: Solve for x
    x = 3,703,901.21/2,747.65
  6. Step 6: Final answer
    x = 1,348.03

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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.