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Finding the Fourth Proportional to 3,584.44, 5,376.84 and 987.40

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Solution

The fourth proportional to 3,584.44, 5,376.84 and 987.40 is: 1,481.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,584.44 : 5,376.84 = 987.40 : x
  2. Step 2: Convert to fraction form
    3,584.44/5,376.84 = 987.40/x
  3. Step 3: Cross multiply
    3,584.44x = 5,376.84 × 987.40
  4. Step 4: Simplify right side
    3,584.44x = 5,309,091.82
  5. Step 5: Solve for x
    x = 5,309,091.82/3,584.44
  6. Step 6: Final answer
    x = 1,481.15

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1.5x scale

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.