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Finding the Fourth Proportional to 613.96, 847.38 and 352.06

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Solution

The fourth proportional to 613.96, 847.38 and 352.06 is: 485.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.96 : 847.38 = 352.06 : x
  2. Step 2: Convert to fraction form
    613.96/847.38 = 352.06/x
  3. Step 3: Cross multiply
    613.96x = 847.38 × 352.06
  4. Step 4: Simplify right side
    613.96x = 298,328.60
  5. Step 5: Solve for x
    x = 298,328.60/613.96
  6. Step 6: Final answer
    x = 485.91

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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.