Home / 2,209.86-3,311.51-1,385.64

Finding the Fourth Proportional to 2,209.86, 3,311.51 and 1,385.64

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Solution

The fourth proportional to 2,209.86, 3,311.51 and 1,385.64 is: 2,076.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.86 : 3,311.51 = 1,385.64 : x
  2. Step 2: Convert to fraction form
    2,209.86/3,311.51 = 1,385.64/x
  3. Step 3: Cross multiply
    2,209.86x = 3,311.51 × 1,385.64
  4. Step 4: Simplify right side
    2,209.86x = 4,588,553.79
  5. Step 5: Solve for x
    x = 4,588,553.79/2,209.86
  6. Step 6: Final answer
    x = 2,076.40

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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.