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Finding the Fourth Proportional to 1,110.81, 1,666.02 and 330.79

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Solution

The fourth proportional to 1,110.81, 1,666.02 and 330.79 is: 496.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.81 : 1,666.02 = 330.79 : x
  2. Step 2: Convert to fraction form
    1,110.81/1,666.02 = 330.79/x
  3. Step 3: Cross multiply
    1,110.81x = 1,666.02 × 330.79
  4. Step 4: Simplify right side
    1,110.81x = 551,102.76
  5. Step 5: Solve for x
    x = 551,102.76/1,110.81
  6. Step 6: Final answer
    x = 496.13

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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.