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Finding the Fourth Proportional to 753.08, 1,121.35 and 744.81

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Solution

The fourth proportional to 753.08, 1,121.35 and 744.81 is: 1,109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.08 : 1,121.35 = 744.81 : x
  2. Step 2: Convert to fraction form
    753.08/1,121.35 = 744.81/x
  3. Step 3: Cross multiply
    753.08x = 1,121.35 × 744.81
  4. Step 4: Simplify right side
    753.08x = 835,198.99
  5. Step 5: Solve for x
    x = 835,198.99/753.08
  6. Step 6: Final answer
    x = 1,109.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.