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Finding the Fourth Proportional to 2,027.58, 3,039.32 and 987.64

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Solution

The fourth proportional to 2,027.58, 3,039.32 and 987.64 is: 1,480.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,027.58 : 3,039.32 = 987.64 : x
  2. Step 2: Convert to fraction form
    2,027.58/3,039.32 = 987.64/x
  3. Step 3: Cross multiply
    2,027.58x = 3,039.32 × 987.64
  4. Step 4: Simplify right side
    2,027.58x = 3,001,765.97
  5. Step 5: Solve for x
    x = 3,001,765.97/2,027.58
  6. Step 6: Final answer
    x = 1,480.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.