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Finding the Fourth Proportional to 1,244.23, 1,717.20 and 720.25

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Solution

The fourth proportional to 1,244.23, 1,717.20 and 720.25 is: 994.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.23 : 1,717.20 = 720.25 : x
  2. Step 2: Convert to fraction form
    1,244.23/1,717.20 = 720.25/x
  3. Step 3: Cross multiply
    1,244.23x = 1,717.20 × 720.25
  4. Step 4: Simplify right side
    1,244.23x = 1,236,813.30
  5. Step 5: Solve for x
    x = 1,236,813.30/1,244.23
  6. Step 6: Final answer
    x = 994.04

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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.