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Finding the Fourth Proportional to 2,758.10, 3,805.80 and 1,638.82

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Solution

The fourth proportional to 2,758.10, 3,805.80 and 1,638.82 is: 2,261.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.10 : 3,805.80 = 1,638.82 : x
  2. Step 2: Convert to fraction form
    2,758.10/3,805.80 = 1,638.82/x
  3. Step 3: Cross multiply
    2,758.10x = 3,805.80 × 1,638.82
  4. Step 4: Simplify right side
    2,758.10x = 6,237,007.58
  5. Step 5: Solve for x
    x = 6,237,007.58/2,758.10
  6. Step 6: Final answer
    x = 2,261.34

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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.