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Finding the Fourth Proportional to 755.65, 1,131.58 and 619.03

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Solution

The fourth proportional to 755.65, 1,131.58 and 619.03 is: 926.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.65 : 1,131.58 = 619.03 : x
  2. Step 2: Convert to fraction form
    755.65/1,131.58 = 619.03/x
  3. Step 3: Cross multiply
    755.65x = 1,131.58 × 619.03
  4. Step 4: Simplify right side
    755.65x = 700,481.97
  5. Step 5: Solve for x
    x = 700,481.97/755.65
  6. Step 6: Final answer
    x = 926.99

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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.