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Finding the Fourth Proportional to 616.12, 850.50 and 395.20

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Solution

The fourth proportional to 616.12, 850.50 and 395.20 is: 545.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.12 : 850.50 = 395.20 : x
  2. Step 2: Convert to fraction form
    616.12/850.50 = 395.20/x
  3. Step 3: Cross multiply
    616.12x = 850.50 × 395.20
  4. Step 4: Simplify right side
    616.12x = 336,117.60
  5. Step 5: Solve for x
    x = 336,117.60/616.12
  6. Step 6: Final answer
    x = 545.54

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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.