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Finding the Fourth Proportional to 2,388.66, 3,296.50 and 1,393.88

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Solution

The fourth proportional to 2,388.66, 3,296.50 and 1,393.88 is: 1,923.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,388.66 : 3,296.50 = 1,393.88 : x
  2. Step 2: Convert to fraction form
    2,388.66/3,296.50 = 1,393.88/x
  3. Step 3: Cross multiply
    2,388.66x = 3,296.50 × 1,393.88
  4. Step 4: Simplify right side
    2,388.66x = 4,594,933.27
  5. Step 5: Solve for x
    x = 4,594,933.27/2,388.66
  6. Step 6: Final answer
    x = 1,923.64

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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.