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Finding the Fourth Proportional to 2,878.60, 4,297.01 and 2,665

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Solution

The fourth proportional to 2,878.60, 4,297.01 and 2,665 is: 3,978.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.60 : 4,297.01 = 2,665 : x
  2. Step 2: Convert to fraction form
    2,878.60/4,297.01 = 2,665/x
  3. Step 3: Cross multiply
    2,878.60x = 4,297.01 × 2,665
  4. Step 4: Simplify right side
    2,878.60x = 11,451,531.65
  5. Step 5: Solve for x
    x = 11,451,531.65/2,878.60
  6. Step 6: Final answer
    x = 3,978.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.