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Finding the Fourth Proportional to 614.72, 847.41 and 439.76

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Solution

The fourth proportional to 614.72, 847.41 and 439.76 is: 606.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.72 : 847.41 = 439.76 : x
  2. Step 2: Convert to fraction form
    614.72/847.41 = 439.76/x
  3. Step 3: Cross multiply
    614.72x = 847.41 × 439.76
  4. Step 4: Simplify right side
    614.72x = 372,657.02
  5. Step 5: Solve for x
    x = 372,657.02/614.72
  6. Step 6: Final answer
    x = 606.22

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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.