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Finding the Fourth Proportional to 3,133.80, 4,346.19 and 2,989.80

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Solution

The fourth proportional to 3,133.80, 4,346.19 and 2,989.80 is: 4,146.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,133.80 : 4,346.19 = 2,989.80 : x
  2. Step 2: Convert to fraction form
    3,133.80/4,346.19 = 2,989.80/x
  3. Step 3: Cross multiply
    3,133.80x = 4,346.19 × 2,989.80
  4. Step 4: Simplify right side
    3,133.80x = 12,994,238.86
  5. Step 5: Solve for x
    x = 12,994,238.86/3,133.80
  6. Step 6: Final answer
    x = 4,146.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.