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Finding the Fourth Proportional to 2,706.94, 4,062.80 and 1,391.61

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Solution

The fourth proportional to 2,706.94, 4,062.80 and 1,391.61 is: 2,088.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,706.94 : 4,062.80 = 1,391.61 : x
  2. Step 2: Convert to fraction form
    2,706.94/4,062.80 = 1,391.61/x
  3. Step 3: Cross multiply
    2,706.94x = 4,062.80 × 1,391.61
  4. Step 4: Simplify right side
    2,706.94x = 5,653,833.11
  5. Step 5: Solve for x
    x = 5,653,833.11/2,706.94
  6. Step 6: Final answer
    x = 2,088.64

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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.