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Finding the Fourth Proportional to 613.61, 846.74 and 351.63

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Solution

The fourth proportional to 613.61, 846.74 and 351.63 is: 485.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.61 : 846.74 = 351.63 : x
  2. Step 2: Convert to fraction form
    613.61/846.74 = 351.63/x
  3. Step 3: Cross multiply
    613.61x = 846.74 × 351.63
  4. Step 4: Simplify right side
    613.61x = 297,737.43
  5. Step 5: Solve for x
    x = 297,737.43/613.61
  6. Step 6: Final answer
    x = 485.23

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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.