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Finding the Fourth Proportional to 1,105.53, 1,525.79 and 633.60

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Solution

The fourth proportional to 1,105.53, 1,525.79 and 633.60 is: 874.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.53 : 1,525.79 = 633.60 : x
  2. Step 2: Convert to fraction form
    1,105.53/1,525.79 = 633.60/x
  3. Step 3: Cross multiply
    1,105.53x = 1,525.79 × 633.60
  4. Step 4: Simplify right side
    1,105.53x = 966,737.38
  5. Step 5: Solve for x
    x = 966,737.38/1,105.53
  6. Step 6: Final answer
    x = 874.46

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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.