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Finding the Fourth Proportional to 2,670, 4,005.54 and 1,131

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Solution

The fourth proportional to 2,670, 4,005.54 and 1,131 is: 1,696.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670 : 4,005.54 = 1,131 : x
  2. Step 2: Convert to fraction form
    2,670/4,005.54 = 1,131/x
  3. Step 3: Cross multiply
    2,670x = 4,005.54 × 1,131
  4. Step 4: Simplify right side
    2,670x = 4,530,265.74
  5. Step 5: Solve for x
    x = 4,530,265.74/2,670
  6. Step 6: Final answer
    x = 1,696.73

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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.