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Finding the Fourth Proportional to 1,110.40, 1,665.60 and 330.41

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Solution

The fourth proportional to 1,110.40, 1,665.60 and 330.41 is: 495.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.40 : 1,665.60 = 330.41 : x
  2. Step 2: Convert to fraction form
    1,110.40/1,665.60 = 330.41/x
  3. Step 3: Cross multiply
    1,110.40x = 1,665.60 × 330.41
  4. Step 4: Simplify right side
    1,110.40x = 550,330.90
  5. Step 5: Solve for x
    x = 550,330.90/1,110.40
  6. Step 6: Final answer
    x = 495.62

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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.