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Finding the Fourth Proportional to 749.26, 1,123.88 and 262.32

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Solution

The fourth proportional to 749.26, 1,123.88 and 262.32 is: 393.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.26 : 1,123.88 = 262.32 : x
  2. Step 2: Convert to fraction form
    749.26/1,123.88 = 262.32/x
  3. Step 3: Cross multiply
    749.26x = 1,123.88 × 262.32
  4. Step 4: Simplify right side
    749.26x = 294,816.20
  5. Step 5: Solve for x
    x = 294,816.20/749.26
  6. Step 6: Final answer
    x = 393.48

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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.