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Finding the Fourth Proportional to 616.20, 850.75 and 476.07

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Solution

The fourth proportional to 616.20, 850.75 and 476.07 is: 657.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.20 : 850.75 = 476.07 : x
  2. Step 2: Convert to fraction form
    616.20/850.75 = 476.07/x
  3. Step 3: Cross multiply
    616.20x = 850.75 × 476.07
  4. Step 4: Simplify right side
    616.20x = 405,016.55
  5. Step 5: Solve for x
    x = 405,016.55/616.20
  6. Step 6: Final answer
    x = 657.28

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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.