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Finding the Fourth Proportional to 3,188.80, 4,783.12 and 998.56

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Solution

The fourth proportional to 3,188.80, 4,783.12 and 998.56 is: 1,497.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.80 : 4,783.12 = 998.56 : x
  2. Step 2: Convert to fraction form
    3,188.80/4,783.12 = 998.56/x
  3. Step 3: Cross multiply
    3,188.80x = 4,783.12 × 998.56
  4. Step 4: Simplify right side
    3,188.80x = 4,776,232.31
  5. Step 5: Solve for x
    x = 4,776,232.31/3,188.80
  6. Step 6: Final answer
    x = 1,497.81

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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.