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Finding the Fourth Proportional to 2,674.86, 3,689.76 and 1,611.90

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Solution

The fourth proportional to 2,674.86, 3,689.76 and 1,611.90 is: 2,223.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,674.86 : 3,689.76 = 1,611.90 : x
  2. Step 2: Convert to fraction form
    2,674.86/3,689.76 = 1,611.90/x
  3. Step 3: Cross multiply
    2,674.86x = 3,689.76 × 1,611.90
  4. Step 4: Simplify right side
    2,674.86x = 5,947,524.14
  5. Step 5: Solve for x
    x = 5,947,524.14/2,674.86
  6. Step 6: Final answer
    x = 2,223.49

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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.