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Finding the Fourth Proportional to 755.70, 1,133.11 and 235.55

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Solution

The fourth proportional to 755.70, 1,133.11 and 235.55 is: 353.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.70 : 1,133.11 = 235.55 : x
  2. Step 2: Convert to fraction form
    755.70/1,133.11 = 235.55/x
  3. Step 3: Cross multiply
    755.70x = 1,133.11 × 235.55
  4. Step 4: Simplify right side
    755.70x = 266,907.19
  5. Step 5: Solve for x
    x = 266,907.19/755.70
  6. Step 6: Final answer
    x = 353.19

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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.