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Finding the Fourth Proportional to 2,648.78, 3,651.54 and 2,087

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Solution

The fourth proportional to 2,648.78, 3,651.54 and 2,087 is: 2,877.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,648.78 : 3,651.54 = 2,087 : x
  2. Step 2: Convert to fraction form
    2,648.78/3,651.54 = 2,087/x
  3. Step 3: Cross multiply
    2,648.78x = 3,651.54 × 2,087
  4. Step 4: Simplify right side
    2,648.78x = 7,620,763.98
  5. Step 5: Solve for x
    x = 7,620,763.98/2,648.78
  6. Step 6: Final answer
    x = 2,877.08

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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.