Home / 1,158.75-1,724.94-1,105.65

Finding the Fourth Proportional to 1,158.75, 1,724.94 and 1,105.65

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Solution

The fourth proportional to 1,158.75, 1,724.94 and 1,105.65 is: 1,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.75 : 1,724.94 = 1,105.65 : x
  2. Step 2: Convert to fraction form
    1,158.75/1,724.94 = 1,105.65/x
  3. Step 3: Cross multiply
    1,158.75x = 1,724.94 × 1,105.65
  4. Step 4: Simplify right side
    1,158.75x = 1,907,179.91
  5. Step 5: Solve for x
    x = 1,907,179.91/1,158.75
  6. Step 6: Final answer
    x = 1,645.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.