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Finding the Fourth Proportional to 3,379.61, 4,661.22 and 2,168.40

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Solution

The fourth proportional to 3,379.61, 4,661.22 and 2,168.40 is: 2,990.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,379.61 : 4,661.22 = 2,168.40 : x
  2. Step 2: Convert to fraction form
    3,379.61/4,661.22 = 2,168.40/x
  3. Step 3: Cross multiply
    3,379.61x = 4,661.22 × 2,168.40
  4. Step 4: Simplify right side
    3,379.61x = 10,107,406.93
  5. Step 5: Solve for x
    x = 10,107,406.93/3,379.61
  6. Step 6: Final answer
    x = 2,990.70

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1.5x scale

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.