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Finding the Fourth Proportional to 477.63, 716.35 and 217.56

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Solution

The fourth proportional to 477.63, 716.35 and 217.56 is: 326.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.63 : 716.35 = 217.56 : x
  2. Step 2: Convert to fraction form
    477.63/716.35 = 217.56/x
  3. Step 3: Cross multiply
    477.63x = 716.35 × 217.56
  4. Step 4: Simplify right side
    477.63x = 155,847.86
  5. Step 5: Solve for x
    x = 155,847.86/477.63
  6. Step 6: Final answer
    x = 326.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.