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Finding the Fourth Proportional to 1,244.13, 1,716.89 and 720.19

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Solution

The fourth proportional to 1,244.13, 1,716.89 and 720.19 is: 993.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.13 : 1,716.89 = 720.19 : x
  2. Step 2: Convert to fraction form
    1,244.13/1,716.89 = 720.19/x
  3. Step 3: Cross multiply
    1,244.13x = 1,716.89 × 720.19
  4. Step 4: Simplify right side
    1,244.13x = 1,236,487.01
  5. Step 5: Solve for x
    x = 1,236,487.01/1,244.13
  6. Step 6: Final answer
    x = 993.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.