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Finding the Fourth Proportional to 1,110.57, 1,665.56 and 330.36

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Solution

The fourth proportional to 1,110.57, 1,665.56 and 330.36 is: 495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.57 : 1,665.56 = 330.36 : x
  2. Step 2: Convert to fraction form
    1,110.57/1,665.56 = 330.36/x
  3. Step 3: Cross multiply
    1,110.57x = 1,665.56 × 330.36
  4. Step 4: Simplify right side
    1,110.57x = 550,229.41
  5. Step 5: Solve for x
    x = 550,229.41/1,110.57
  6. Step 6: Final answer
    x = 495.45

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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.