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Finding the Fourth Proportional to 1,998.68, 2,758.08 and 1,114.48

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Solution

The fourth proportional to 1,998.68, 2,758.08 and 1,114.48 is: 1,537.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.68 : 2,758.08 = 1,114.48 : x
  2. Step 2: Convert to fraction form
    1,998.68/2,758.08 = 1,114.48/x
  3. Step 3: Cross multiply
    1,998.68x = 2,758.08 × 1,114.48
  4. Step 4: Simplify right side
    1,998.68x = 3,073,825.00
  5. Step 5: Solve for x
    x = 3,073,825.00/1,998.68
  6. Step 6: Final answer
    x = 1,537.93

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1.5x scale

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.