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Finding the Fourth Proportional to 478.52, 717.78 and 222.20

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Solution

The fourth proportional to 478.52, 717.78 and 222.20 is: 333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.52 : 717.78 = 222.20 : x
  2. Step 2: Convert to fraction form
    478.52/717.78 = 222.20/x
  3. Step 3: Cross multiply
    478.52x = 717.78 × 222.20
  4. Step 4: Simplify right side
    478.52x = 159,490.72
  5. Step 5: Solve for x
    x = 159,490.72/478.52
  6. Step 6: Final answer
    x = 333.30

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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.