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Finding the Fourth Proportional to 755.81, 1,133.82 and 323.07

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Solution

The fourth proportional to 755.81, 1,133.82 and 323.07 is: 484.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.81 : 1,133.82 = 323.07 : x
  2. Step 2: Convert to fraction form
    755.81/1,133.82 = 323.07/x
  3. Step 3: Cross multiply
    755.81x = 1,133.82 × 323.07
  4. Step 4: Simplify right side
    755.81x = 366,303.23
  5. Step 5: Solve for x
    x = 366,303.23/755.81
  6. Step 6: Final answer
    x = 484.65

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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.