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Finding the Fourth Proportional to 1,109.82, 1,664.91 and 369.46

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Solution

The fourth proportional to 1,109.82, 1,664.91 and 369.46 is: 554.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.82 : 1,664.91 = 369.46 : x
  2. Step 2: Convert to fraction form
    1,109.82/1,664.91 = 369.46/x
  3. Step 3: Cross multiply
    1,109.82x = 1,664.91 × 369.46
  4. Step 4: Simplify right side
    1,109.82x = 615,107.48
  5. Step 5: Solve for x
    x = 615,107.48/1,109.82
  6. Step 6: Final answer
    x = 554.24

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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.