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Finding the Fourth Proportional to 744.42, 1,122.34 and 694.23

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Solution

The fourth proportional to 744.42, 1,122.34 and 694.23 is: 1,046.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.42 : 1,122.34 = 694.23 : x
  2. Step 2: Convert to fraction form
    744.42/1,122.34 = 694.23/x
  3. Step 3: Cross multiply
    744.42x = 1,122.34 × 694.23
  4. Step 4: Simplify right side
    744.42x = 779,162.10
  5. Step 5: Solve for x
    x = 779,162.10/744.42
  6. Step 6: Final answer
    x = 1,046.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.