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Finding the Fourth Proportional to 849.58, 1,273.79 and 380.88

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Solution

The fourth proportional to 849.58, 1,273.79 and 380.88 is: 571.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.58 : 1,273.79 = 380.88 : x
  2. Step 2: Convert to fraction form
    849.58/1,273.79 = 380.88/x
  3. Step 3: Cross multiply
    849.58x = 1,273.79 × 380.88
  4. Step 4: Simplify right side
    849.58x = 485,161.14
  5. Step 5: Solve for x
    x = 485,161.14/849.58
  6. Step 6: Final answer
    x = 571.06

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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.