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Finding the Fourth Proportional to 2,391.66, 3,300.84 and 1,396.80

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Solution

The fourth proportional to 2,391.66, 3,300.84 and 1,396.80 is: 1,927.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.66 : 3,300.84 = 1,396.80 : x
  2. Step 2: Convert to fraction form
    2,391.66/3,300.84 = 1,396.80/x
  3. Step 3: Cross multiply
    2,391.66x = 3,300.84 × 1,396.80
  4. Step 4: Simplify right side
    2,391.66x = 4,610,613.31
  5. Step 5: Solve for x
    x = 4,610,613.31/2,391.66
  6. Step 6: Final answer
    x = 1,927.79

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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.