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Finding the Fourth Proportional to 1,089.33, 1,633.94 and 267.55

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Solution

The fourth proportional to 1,089.33, 1,633.94 and 267.55 is: 401.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.33 : 1,633.94 = 267.55 : x
  2. Step 2: Convert to fraction form
    1,089.33/1,633.94 = 267.55/x
  3. Step 3: Cross multiply
    1,089.33x = 1,633.94 × 267.55
  4. Step 4: Simplify right side
    1,089.33x = 437,159.31
  5. Step 5: Solve for x
    x = 437,159.31/1,089.33
  6. Step 6: Final answer
    x = 401.31

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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.