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Finding the Fourth Proportional to 911.10, 1,366.66 and 294.80

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Solution

The fourth proportional to 911.10, 1,366.66 and 294.80 is: 442.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.10 : 1,366.66 = 294.80 : x
  2. Step 2: Convert to fraction form
    911.10/1,366.66 = 294.80/x
  3. Step 3: Cross multiply
    911.10x = 1,366.66 × 294.80
  4. Step 4: Simplify right side
    911.10x = 402,891.37
  5. Step 5: Solve for x
    x = 402,891.37/911.10
  6. Step 6: Final answer
    x = 442.20

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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.