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Finding the Fourth Proportional to 1,244.51, 1,717.65 and 720.54

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Solution

The fourth proportional to 1,244.51, 1,717.65 and 720.54 is: 994.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.51 : 1,717.65 = 720.54 : x
  2. Step 2: Convert to fraction form
    1,244.51/1,717.65 = 720.54/x
  3. Step 3: Cross multiply
    1,244.51x = 1,717.65 × 720.54
  4. Step 4: Simplify right side
    1,244.51x = 1,237,634.18
  5. Step 5: Solve for x
    x = 1,237,634.18/1,244.51
  6. Step 6: Final answer
    x = 994.48

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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.