Home / 2,311.24-3,186.64-1,689.16

Finding the Fourth Proportional to 2,311.24, 3,186.64 and 1,689.16

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Solution

The fourth proportional to 2,311.24, 3,186.64 and 1,689.16 is: 2,328.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.24 : 3,186.64 = 1,689.16 : x
  2. Step 2: Convert to fraction form
    2,311.24/3,186.64 = 1,689.16/x
  3. Step 3: Cross multiply
    2,311.24x = 3,186.64 × 1,689.16
  4. Step 4: Simplify right side
    2,311.24x = 5,382,744.82
  5. Step 5: Solve for x
    x = 5,382,744.82/2,311.24
  6. Step 6: Final answer
    x = 2,328.94

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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.