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Finding the Fourth Proportional to 1,105.28, 1,525.20 and 633.32

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Solution

The fourth proportional to 1,105.28, 1,525.20 and 633.32 is: 873.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.28 : 1,525.20 = 633.32 : x
  2. Step 2: Convert to fraction form
    1,105.28/1,525.20 = 633.32/x
  3. Step 3: Cross multiply
    1,105.28x = 1,525.20 × 633.32
  4. Step 4: Simplify right side
    1,105.28x = 965,939.66
  5. Step 5: Solve for x
    x = 965,939.66/1,105.28
  6. Step 6: Final answer
    x = 873.93

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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.