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Finding the Fourth Proportional to 2,388.56, 3,297.38 and 2,138.88

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Solution

The fourth proportional to 2,388.56, 3,297.38 and 2,138.88 is: 2,952.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,388.56 : 3,297.38 = 2,138.88 : x
  2. Step 2: Convert to fraction form
    2,388.56/3,297.38 = 2,138.88/x
  3. Step 3: Cross multiply
    2,388.56x = 3,297.38 × 2,138.88
  4. Step 4: Simplify right side
    2,388.56x = 7,052,700.13
  5. Step 5: Solve for x
    x = 7,052,700.13/2,388.56
  6. Step 6: Final answer
    x = 2,952.70

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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.