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Finding the Fourth Proportional to 755.65, 1,133.81 and 365.43

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Solution

The fourth proportional to 755.65, 1,133.81 and 365.43 is: 548.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.65 : 1,133.81 = 365.43 : x
  2. Step 2: Convert to fraction form
    755.65/1,133.81 = 365.43/x
  3. Step 3: Cross multiply
    755.65x = 1,133.81 × 365.43
  4. Step 4: Simplify right side
    755.65x = 414,328.19
  5. Step 5: Solve for x
    x = 414,328.19/755.65
  6. Step 6: Final answer
    x = 548.31

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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.