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Finding the Fourth Proportional to 613.55, 846.77 and 351.65

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Solution

The fourth proportional to 613.55, 846.77 and 351.65 is: 485.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.55 : 846.77 = 351.65 : x
  2. Step 2: Convert to fraction form
    613.55/846.77 = 351.65/x
  3. Step 3: Cross multiply
    613.55x = 846.77 × 351.65
  4. Step 4: Simplify right side
    613.55x = 297,760.68
  5. Step 5: Solve for x
    x = 297,760.68/613.55
  6. Step 6: Final answer
    x = 485.31

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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.