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Finding the Fourth Proportional to 1,110.31, 1,665.31 and 330.43

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Solution

The fourth proportional to 1,110.31, 1,665.31 and 330.43 is: 495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.31 : 1,665.31 = 330.43 : x
  2. Step 2: Convert to fraction form
    1,110.31/1,665.31 = 330.43/x
  3. Step 3: Cross multiply
    1,110.31x = 1,665.31 × 330.43
  4. Step 4: Simplify right side
    1,110.31x = 550,267.14
  5. Step 5: Solve for x
    x = 550,267.14/1,110.31
  6. Step 6: Final answer
    x = 495.60

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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.