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Finding the Fourth Proportional to 2,150, 2,967 and 1,218.68

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Solution

The fourth proportional to 2,150, 2,967 and 1,218.68 is: 1,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,150 : 2,967 = 1,218.68 : x
  2. Step 2: Convert to fraction form
    2,150/2,967 = 1,218.68/x
  3. Step 3: Cross multiply
    2,150x = 2,967 × 1,218.68
  4. Step 4: Simplify right side
    2,150x = 3,615,823.56
  5. Step 5: Solve for x
    x = 3,615,823.56/2,150
  6. Step 6: Final answer
    x = 1,681.78

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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.