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Finding the Fourth Proportional to 911.16, 1,363.95 and 736.20

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Solution

The fourth proportional to 911.16, 1,363.95 and 736.20 is: 1,102.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.16 : 1,363.95 = 736.20 : x
  2. Step 2: Convert to fraction form
    911.16/1,363.95 = 736.20/x
  3. Step 3: Cross multiply
    911.16x = 1,363.95 × 736.20
  4. Step 4: Simplify right side
    911.16x = 1,004,139.99
  5. Step 5: Solve for x
    x = 1,004,139.99/911.16
  6. Step 6: Final answer
    x = 1,102.05

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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.