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Finding the Fourth Proportional to 911.48, 1,366.04 and 747.07

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Solution

The fourth proportional to 911.48, 1,366.04 and 747.07 is: 1,119.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.48 : 1,366.04 = 747.07 : x
  2. Step 2: Convert to fraction form
    911.48/1,366.04 = 747.07/x
  3. Step 3: Cross multiply
    911.48x = 1,366.04 × 747.07
  4. Step 4: Simplify right side
    911.48x = 1,020,531.54
  5. Step 5: Solve for x
    x = 1,020,531.54/911.48
  6. Step 6: Final answer
    x = 1,119.64

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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.