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Finding the Fourth Proportional to 955.22, 1,318.10 and 562.20

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Solution

The fourth proportional to 955.22, 1,318.10 and 562.20 is: 775.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.22 : 1,318.10 = 562.20 : x
  2. Step 2: Convert to fraction form
    955.22/1,318.10 = 562.20/x
  3. Step 3: Cross multiply
    955.22x = 1,318.10 × 562.20
  4. Step 4: Simplify right side
    955.22x = 741,035.82
  5. Step 5: Solve for x
    x = 741,035.82/955.22
  6. Step 6: Final answer
    x = 775.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.