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Finding the Fourth Proportional to 2,006.38, 3,008.79 and 689.88

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Solution

The fourth proportional to 2,006.38, 3,008.79 and 689.88 is: 1,034.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,006.38 : 3,008.79 = 689.88 : x
  2. Step 2: Convert to fraction form
    2,006.38/3,008.79 = 689.88/x
  3. Step 3: Cross multiply
    2,006.38x = 3,008.79 × 689.88
  4. Step 4: Simplify right side
    2,006.38x = 2,075,711.57
  5. Step 5: Solve for x
    x = 2,075,711.57/2,006.38
  6. Step 6: Final answer
    x = 1,034.56

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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.