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Finding the Fourth Proportional to 1,244.72, 1,717.48 and 851.60

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Solution

The fourth proportional to 1,244.72, 1,717.48 and 851.60 is: 1,175.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.72 : 1,717.48 = 851.60 : x
  2. Step 2: Convert to fraction form
    1,244.72/1,717.48 = 851.60/x
  3. Step 3: Cross multiply
    1,244.72x = 1,717.48 × 851.60
  4. Step 4: Simplify right side
    1,244.72x = 1,462,605.97
  5. Step 5: Solve for x
    x = 1,462,605.97/1,244.72
  6. Step 6: Final answer
    x = 1,175.05

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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.