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Finding the Fourth Proportional to 2,132.43, 3,197.62 and 670.78

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Solution

The fourth proportional to 2,132.43, 3,197.62 and 670.78 is: 1,005.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.43 : 3,197.62 = 670.78 : x
  2. Step 2: Convert to fraction form
    2,132.43/3,197.62 = 670.78/x
  3. Step 3: Cross multiply
    2,132.43x = 3,197.62 × 670.78
  4. Step 4: Simplify right side
    2,132.43x = 2,144,899.54
  5. Step 5: Solve for x
    x = 2,144,899.54/2,132.43
  6. Step 6: Final answer
    x = 1,005.85

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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.