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Finding the Fourth Proportional to 749.06, 1,122.59 and 338.12

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Solution

The fourth proportional to 749.06, 1,122.59 and 338.12 is: 506.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.06 : 1,122.59 = 338.12 : x
  2. Step 2: Convert to fraction form
    749.06/1,122.59 = 338.12/x
  3. Step 3: Cross multiply
    749.06x = 1,122.59 × 338.12
  4. Step 4: Simplify right side
    749.06x = 379,570.13
  5. Step 5: Solve for x
    x = 379,570.13/749.06
  6. Step 6: Final answer
    x = 506.73

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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.