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Finding the Fourth Proportional to 1,699.47, 2,344.54 and 991.26

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Solution

The fourth proportional to 1,699.47, 2,344.54 and 991.26 is: 1,367.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,699.47 : 2,344.54 = 991.26 : x
  2. Step 2: Convert to fraction form
    1,699.47/2,344.54 = 991.26/x
  3. Step 3: Cross multiply
    1,699.47x = 2,344.54 × 991.26
  4. Step 4: Simplify right side
    1,699.47x = 2,324,048.72
  5. Step 5: Solve for x
    x = 2,324,048.72/1,699.47
  6. Step 6: Final answer
    x = 1,367.51

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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.