Home / 1,285.16-1,928.46-1,187.24

Finding the Fourth Proportional to 1,285.16, 1,928.46 and 1,187.24

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Solution

The fourth proportional to 1,285.16, 1,928.46 and 1,187.24 is: 1,781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.16 : 1,928.46 = 1,187.24 : x
  2. Step 2: Convert to fraction form
    1,285.16/1,928.46 = 1,187.24/x
  3. Step 3: Cross multiply
    1,285.16x = 1,928.46 × 1,187.24
  4. Step 4: Simplify right side
    1,285.16x = 2,289,544.85
  5. Step 5: Solve for x
    x = 2,289,544.85/1,285.16
  6. Step 6: Final answer
    x = 1,781.53

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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.