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Finding the Fourth Proportional to 614.20, 847.50 and 352.21

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Solution

The fourth proportional to 614.20, 847.50 and 352.21 is: 485.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.20 : 847.50 = 352.21 : x
  2. Step 2: Convert to fraction form
    614.20/847.50 = 352.21/x
  3. Step 3: Cross multiply
    614.20x = 847.50 × 352.21
  4. Step 4: Simplify right side
    614.20x = 298,497.98
  5. Step 5: Solve for x
    x = 298,497.98/614.20
  6. Step 6: Final answer
    x = 485.99

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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.