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Finding the Fourth Proportional to 3,331.09, 4,997.63 and 991.17

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Solution

The fourth proportional to 3,331.09, 4,997.63 and 991.17 is: 1,487.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,331.09 : 4,997.63 = 991.17 : x
  2. Step 2: Convert to fraction form
    3,331.09/4,997.63 = 991.17/x
  3. Step 3: Cross multiply
    3,331.09x = 4,997.63 × 991.17
  4. Step 4: Simplify right side
    3,331.09x = 4,953,500.93
  5. Step 5: Solve for x
    x = 4,953,500.93/3,331.09
  6. Step 6: Final answer
    x = 1,487.05

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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.