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Finding the Fourth Proportional to 3,187.44, 4,780.80 and 996.24

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Solution

The fourth proportional to 3,187.44, 4,780.80 and 996.24 is: 1,494.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.44 : 4,780.80 = 996.24 : x
  2. Step 2: Convert to fraction form
    3,187.44/4,780.80 = 996.24/x
  3. Step 3: Cross multiply
    3,187.44x = 4,780.80 × 996.24
  4. Step 4: Simplify right side
    3,187.44x = 4,762,824.19
  5. Step 5: Solve for x
    x = 4,762,824.19/3,187.44
  6. Step 6: Final answer
    x = 1,494.25

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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.