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Finding the Fourth Proportional to 2,132.70, 3,199.07 and 671.86

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Solution

The fourth proportional to 2,132.70, 3,199.07 and 671.86 is: 1,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.70 : 3,199.07 = 671.86 : x
  2. Step 2: Convert to fraction form
    2,132.70/3,199.07 = 671.86/x
  3. Step 3: Cross multiply
    2,132.70x = 3,199.07 × 671.86
  4. Step 4: Simplify right side
    2,132.70x = 2,149,327.17
  5. Step 5: Solve for x
    x = 2,149,327.17/2,132.70
  6. Step 6: Final answer
    x = 1,007.80

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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.