Home / 2,138.64-3,207.40-968.16

Finding the Fourth Proportional to 2,138.64, 3,207.40 and 968.16

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Solution

The fourth proportional to 2,138.64, 3,207.40 and 968.16 is: 1,451.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.64 : 3,207.40 = 968.16 : x
  2. Step 2: Convert to fraction form
    2,138.64/3,207.40 = 968.16/x
  3. Step 3: Cross multiply
    2,138.64x = 3,207.40 × 968.16
  4. Step 4: Simplify right side
    2,138.64x = 3,105,276.38
  5. Step 5: Solve for x
    x = 3,105,276.38/2,138.64
  6. Step 6: Final answer
    x = 1,451.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.