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Finding the Fourth Proportional to 613.95, 847.05 and 351.91

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Solution

The fourth proportional to 613.95, 847.05 and 351.91 is: 485.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.95 : 847.05 = 351.91 : x
  2. Step 2: Convert to fraction form
    613.95/847.05 = 351.91/x
  3. Step 3: Cross multiply
    613.95x = 847.05 × 351.91
  4. Step 4: Simplify right side
    613.95x = 298,085.37
  5. Step 5: Solve for x
    x = 298,085.37/613.95
  6. Step 6: Final answer
    x = 485.52

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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.