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Finding the Fourth Proportional to 616.76, 851.18 and 351.22

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Solution

The fourth proportional to 616.76, 851.18 and 351.22 is: 484.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.76 : 851.18 = 351.22 : x
  2. Step 2: Convert to fraction form
    616.76/851.18 = 351.22/x
  3. Step 3: Cross multiply
    616.76x = 851.18 × 351.22
  4. Step 4: Simplify right side
    616.76x = 298,949.15
  5. Step 5: Solve for x
    x = 298,949.15/616.76
  6. Step 6: Final answer
    x = 484.71

Related Problems

Find fourth proportional to 308.38, 425.59 and 175.61
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Double scale
Find fourth proportional to 617.76, 852.56 and 352.22
Similar ratio
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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.