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Finding the Fourth Proportional to 911.33, 1,366.69 and 294.87

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Solution

The fourth proportional to 911.33, 1,366.69 and 294.87 is: 442.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.33 : 1,366.69 = 294.87 : x
  2. Step 2: Convert to fraction form
    911.33/1,366.69 = 294.87/x
  3. Step 3: Cross multiply
    911.33x = 1,366.69 × 294.87
  4. Step 4: Simplify right side
    911.33x = 402,995.88
  5. Step 5: Solve for x
    x = 402,995.88/911.33
  6. Step 6: Final answer
    x = 442.21

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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.