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Finding the Fourth Proportional to 611.18, 911.96 and 552.42

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Solution

The fourth proportional to 611.18, 911.96 and 552.42 is: 824.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.18 : 911.96 = 552.42 : x
  2. Step 2: Convert to fraction form
    611.18/911.96 = 552.42/x
  3. Step 3: Cross multiply
    611.18x = 911.96 × 552.42
  4. Step 4: Simplify right side
    611.18x = 503,784.25
  5. Step 5: Solve for x
    x = 503,784.25/611.18
  6. Step 6: Final answer
    x = 824.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.