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Finding the Fourth Proportional to 755.39, 1,133.03 and 261.68

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Solution

The fourth proportional to 755.39, 1,133.03 and 261.68 is: 392.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.39 : 1,133.03 = 261.68 : x
  2. Step 2: Convert to fraction form
    755.39/1,133.03 = 261.68/x
  3. Step 3: Cross multiply
    755.39x = 1,133.03 × 261.68
  4. Step 4: Simplify right side
    755.39x = 296,491.29
  5. Step 5: Solve for x
    x = 296,491.29/755.39
  6. Step 6: Final answer
    x = 392.50

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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.