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Finding the Fourth Proportional to 1,617.25, 2,231.73 and 988.82

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Solution

The fourth proportional to 1,617.25, 2,231.73 and 988.82 is: 1,364.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.25 : 2,231.73 = 988.82 : x
  2. Step 2: Convert to fraction form
    1,617.25/2,231.73 = 988.82/x
  3. Step 3: Cross multiply
    1,617.25x = 2,231.73 × 988.82
  4. Step 4: Simplify right side
    1,617.25x = 2,206,779.26
  5. Step 5: Solve for x
    x = 2,206,779.26/1,617.25
  6. Step 6: Final answer
    x = 1,364.53

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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.