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Finding the Fourth Proportional to 1,642.26, 2,463.39 and 991.62

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Solution

The fourth proportional to 1,642.26, 2,463.39 and 991.62 is: 1,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.26 : 2,463.39 = 991.62 : x
  2. Step 2: Convert to fraction form
    1,642.26/2,463.39 = 991.62/x
  3. Step 3: Cross multiply
    1,642.26x = 2,463.39 × 991.62
  4. Step 4: Simplify right side
    1,642.26x = 2,442,736.91
  5. Step 5: Solve for x
    x = 2,442,736.91/1,642.26
  6. Step 6: Final answer
    x = 1,487.43

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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.