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Finding the Fourth Proportional to 849.16, 1,273.56 and 272.20

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Solution

The fourth proportional to 849.16, 1,273.56 and 272.20 is: 408.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.16 : 1,273.56 = 272.20 : x
  2. Step 2: Convert to fraction form
    849.16/1,273.56 = 272.20/x
  3. Step 3: Cross multiply
    849.16x = 1,273.56 × 272.20
  4. Step 4: Simplify right side
    849.16x = 346,663.03
  5. Step 5: Solve for x
    x = 346,663.03/849.16
  6. Step 6: Final answer
    x = 408.24

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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.