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Finding the Fourth Proportional to 2,726.08, 3,760 and 1,678.72

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Solution

The fourth proportional to 2,726.08, 3,760 and 1,678.72 is: 2,315.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,726.08 : 3,760 = 1,678.72 : x
  2. Step 2: Convert to fraction form
    2,726.08/3,760 = 1,678.72/x
  3. Step 3: Cross multiply
    2,726.08x = 3,760 × 1,678.72
  4. Step 4: Simplify right side
    2,726.08x = 6,311,987.20
  5. Step 5: Solve for x
    x = 6,311,987.20/2,726.08
  6. Step 6: Final answer
    x = 2,315.41

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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.