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Finding the Fourth Proportional to 1,331.08, 1,998.04 and 1,177.98

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Solution

The fourth proportional to 1,331.08, 1,998.04 and 1,177.98 is: 1,768.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.08 : 1,998.04 = 1,177.98 : x
  2. Step 2: Convert to fraction form
    1,331.08/1,998.04 = 1,177.98/x
  3. Step 3: Cross multiply
    1,331.08x = 1,998.04 × 1,177.98
  4. Step 4: Simplify right side
    1,331.08x = 2,353,651.16
  5. Step 5: Solve for x
    x = 2,353,651.16/1,331.08
  6. Step 6: Final answer
    x = 1,768.23

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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.