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Finding the Fourth Proportional to 2,684.97, 3,702.78 and 1,789.21

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Solution

The fourth proportional to 2,684.97, 3,702.78 and 1,789.21 is: 2,467.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,684.97 : 3,702.78 = 1,789.21 : x
  2. Step 2: Convert to fraction form
    2,684.97/3,702.78 = 1,789.21/x
  3. Step 3: Cross multiply
    2,684.97x = 3,702.78 × 1,789.21
  4. Step 4: Simplify right side
    2,684.97x = 6,625,055.63
  5. Step 5: Solve for x
    x = 6,625,055.63/2,684.97
  6. Step 6: Final answer
    x = 2,467.46

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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.