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Finding the Fourth Proportional to 1,244.62, 1,717.77 and 720.82

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Solution

The fourth proportional to 1,244.62, 1,717.77 and 720.82 is: 994.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.62 : 1,717.77 = 720.82 : x
  2. Step 2: Convert to fraction form
    1,244.62/1,717.77 = 720.82/x
  3. Step 3: Cross multiply
    1,244.62x = 1,717.77 × 720.82
  4. Step 4: Simplify right side
    1,244.62x = 1,238,202.97
  5. Step 5: Solve for x
    x = 1,238,202.97/1,244.62
  6. Step 6: Final answer
    x = 994.84

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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.