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Finding the Fourth Proportional to 477.74, 716.43 and 217.52

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Solution

The fourth proportional to 477.74, 716.43 and 217.52 is: 326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.74 : 716.43 = 217.52 : x
  2. Step 2: Convert to fraction form
    477.74/716.43 = 217.52/x
  3. Step 3: Cross multiply
    477.74x = 716.43 × 217.52
  4. Step 4: Simplify right side
    477.74x = 155,837.85
  5. Step 5: Solve for x
    x = 155,837.85/477.74
  6. Step 6: Final answer
    x = 326.20

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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.