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Finding the Fourth Proportional to 1,356.49, 2,034.19 and 872.65

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Solution

The fourth proportional to 1,356.49, 2,034.19 and 872.65 is: 1,308.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.49 : 2,034.19 = 872.65 : x
  2. Step 2: Convert to fraction form
    1,356.49/2,034.19 = 872.65/x
  3. Step 3: Cross multiply
    1,356.49x = 2,034.19 × 872.65
  4. Step 4: Simplify right side
    1,356.49x = 1,775,135.90
  5. Step 5: Solve for x
    x = 1,775,135.90/1,356.49
  6. Step 6: Final answer
    x = 1,308.62

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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.