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Finding the Fourth Proportional to 613.77, 847.01 and 351.79

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Solution

The fourth proportional to 613.77, 847.01 and 351.79 is: 485.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.77 : 847.01 = 351.79 : x
  2. Step 2: Convert to fraction form
    613.77/847.01 = 351.79/x
  3. Step 3: Cross multiply
    613.77x = 847.01 × 351.79
  4. Step 4: Simplify right side
    613.77x = 297,967.71
  5. Step 5: Solve for x
    x = 297,967.71/613.77
  6. Step 6: Final answer
    x = 485.47

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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.