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Finding the Fourth Proportional to 749.78, 1,124.81 and 262.76

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Solution

The fourth proportional to 749.78, 1,124.81 and 262.76 is: 394.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.78 : 1,124.81 = 262.76 : x
  2. Step 2: Convert to fraction form
    749.78/1,124.81 = 262.76/x
  3. Step 3: Cross multiply
    749.78x = 1,124.81 × 262.76
  4. Step 4: Simplify right side
    749.78x = 295,548.14
  5. Step 5: Solve for x
    x = 295,548.14/749.78
  6. Step 6: Final answer
    x = 394.18

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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.