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Finding the Fourth Proportional to 2,769.56, 4,154.34 and 689.56

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Solution

The fourth proportional to 2,769.56, 4,154.34 and 689.56 is: 1,034.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,769.56 : 4,154.34 = 689.56 : x
  2. Step 2: Convert to fraction form
    2,769.56/4,154.34 = 689.56/x
  3. Step 3: Cross multiply
    2,769.56x = 4,154.34 × 689.56
  4. Step 4: Simplify right side
    2,769.56x = 2,864,678.38
  5. Step 5: Solve for x
    x = 2,864,678.38/2,769.56
  6. Step 6: Final answer
    x = 1,034.34

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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.