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Finding the Fourth Proportional to 3,330.95, 4,997.39 and 990.96

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Solution

The fourth proportional to 3,330.95, 4,997.39 and 990.96 is: 1,486.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,330.95 : 4,997.39 = 990.96 : x
  2. Step 2: Convert to fraction form
    3,330.95/4,997.39 = 990.96/x
  3. Step 3: Cross multiply
    3,330.95x = 4,997.39 × 990.96
  4. Step 4: Simplify right side
    3,330.95x = 4,952,208.64
  5. Step 5: Solve for x
    x = 4,952,208.64/3,330.95
  6. Step 6: Final answer
    x = 1,486.73

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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.