Home / 1,115.15-1,674.08-1,107.05

Finding the Fourth Proportional to 1,115.15, 1,674.08 and 1,107.05

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Solution

The fourth proportional to 1,115.15, 1,674.08 and 1,107.05 is: 1,661.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.15 : 1,674.08 = 1,107.05 : x
  2. Step 2: Convert to fraction form
    1,115.15/1,674.08 = 1,107.05/x
  3. Step 3: Cross multiply
    1,115.15x = 1,674.08 × 1,107.05
  4. Step 4: Simplify right side
    1,115.15x = 1,853,284.73
  5. Step 5: Solve for x
    x = 1,853,284.73/1,115.15
  6. Step 6: Final answer
    x = 1,661.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.