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Finding the Fourth Proportional to 1,163.24, 1,606.20 and 900.80

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Solution

The fourth proportional to 1,163.24, 1,606.20 and 900.80 is: 1,243.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.24 : 1,606.20 = 900.80 : x
  2. Step 2: Convert to fraction form
    1,163.24/1,606.20 = 900.80/x
  3. Step 3: Cross multiply
    1,163.24x = 1,606.20 × 900.80
  4. Step 4: Simplify right side
    1,163.24x = 1,446,864.96
  5. Step 5: Solve for x
    x = 1,446,864.96/1,163.24
  6. Step 6: Final answer
    x = 1,243.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.