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Finding the Fourth Proportional to 1,955.80, 2,699.15 and 1,116.54

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Solution

The fourth proportional to 1,955.80, 2,699.15 and 1,116.54 is: 1,540.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.80 : 2,699.15 = 1,116.54 : x
  2. Step 2: Convert to fraction form
    1,955.80/2,699.15 = 1,116.54/x
  3. Step 3: Cross multiply
    1,955.80x = 2,699.15 × 1,116.54
  4. Step 4: Simplify right side
    1,955.80x = 3,013,703.39
  5. Step 5: Solve for x
    x = 3,013,703.39/1,955.80
  6. Step 6: Final answer
    x = 1,540.91

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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.