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Finding the Fourth Proportional to 616.62, 850.71 and 406.90

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Solution

The fourth proportional to 616.62, 850.71 and 406.90 is: 561.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.62 : 850.71 = 406.90 : x
  2. Step 2: Convert to fraction form
    616.62/850.71 = 406.90/x
  3. Step 3: Cross multiply
    616.62x = 850.71 × 406.90
  4. Step 4: Simplify right side
    616.62x = 346,153.90
  5. Step 5: Solve for x
    x = 346,153.90/616.62
  6. Step 6: Final answer
    x = 561.37

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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.