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Finding the Fourth Proportional to 616.41, 918.70 and 611.33

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Solution

The fourth proportional to 616.41, 918.70 and 611.33 is: 911.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.41 : 918.70 = 611.33 : x
  2. Step 2: Convert to fraction form
    616.41/918.70 = 611.33/x
  3. Step 3: Cross multiply
    616.41x = 918.70 × 611.33
  4. Step 4: Simplify right side
    616.41x = 561,622.75
  5. Step 5: Solve for x
    x = 561,622.75/616.41
  6. Step 6: Final answer
    x = 911.12

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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.