Home / 2,115.87-3,174.45-946.85

Finding the Fourth Proportional to 2,115.87, 3,174.45 and 946.85

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Solution

The fourth proportional to 2,115.87, 3,174.45 and 946.85 is: 1,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.87 : 3,174.45 = 946.85 : x
  2. Step 2: Convert to fraction form
    2,115.87/3,174.45 = 946.85/x
  3. Step 3: Cross multiply
    2,115.87x = 3,174.45 × 946.85
  4. Step 4: Simplify right side
    2,115.87x = 3,005,727.98
  5. Step 5: Solve for x
    x = 3,005,727.98/2,115.87
  6. Step 6: Final answer
    x = 1,420.56

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1.5x scale

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.