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Finding the Fourth Proportional to 2,491.13, 3,736.68 and 642.25

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Solution

The fourth proportional to 2,491.13, 3,736.68 and 642.25 is: 963.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.13 : 3,736.68 = 642.25 : x
  2. Step 2: Convert to fraction form
    2,491.13/3,736.68 = 642.25/x
  3. Step 3: Cross multiply
    2,491.13x = 3,736.68 × 642.25
  4. Step 4: Simplify right side
    2,491.13x = 2,399,882.73
  5. Step 5: Solve for x
    x = 2,399,882.73/2,491.13
  6. Step 6: Final answer
    x = 963.37

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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.