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Finding the Fourth Proportional to 614.78, 847.23 and 439.82

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Solution

The fourth proportional to 614.78, 847.23 and 439.82 is: 606.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.78 : 847.23 = 439.82 : x
  2. Step 2: Convert to fraction form
    614.78/847.23 = 439.82/x
  3. Step 3: Cross multiply
    614.78x = 847.23 × 439.82
  4. Step 4: Simplify right side
    614.78x = 372,628.70
  5. Step 5: Solve for x
    x = 372,628.70/614.78
  6. Step 6: Final answer
    x = 606.12

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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.