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Finding the Fourth Proportional to 749.19, 1,123.81 and 262.58

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Solution

The fourth proportional to 749.19, 1,123.81 and 262.58 is: 393.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.19 : 1,123.81 = 262.58 : x
  2. Step 2: Convert to fraction form
    749.19/1,123.81 = 262.58/x
  3. Step 3: Cross multiply
    749.19x = 1,123.81 × 262.58
  4. Step 4: Simplify right side
    749.19x = 295,090.03
  5. Step 5: Solve for x
    x = 295,090.03/749.19
  6. Step 6: Final answer
    x = 393.88

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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.