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Finding the Fourth Proportional to 616.66, 850.79 and 419.83

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Solution

The fourth proportional to 616.66, 850.79 and 419.83 is: 579.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.66 : 850.79 = 419.83 : x
  2. Step 2: Convert to fraction form
    616.66/850.79 = 419.83/x
  3. Step 3: Cross multiply
    616.66x = 850.79 × 419.83
  4. Step 4: Simplify right side
    616.66x = 357,183.73
  5. Step 5: Solve for x
    x = 357,183.73/616.66
  6. Step 6: Final answer
    x = 579.23

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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.