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Finding the Fourth Proportional to 478.50, 717.72 and 234.95

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Solution

The fourth proportional to 478.50, 717.72 and 234.95 is: 352.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.50 : 717.72 = 234.95 : x
  2. Step 2: Convert to fraction form
    478.50/717.72 = 234.95/x
  3. Step 3: Cross multiply
    478.50x = 717.72 × 234.95
  4. Step 4: Simplify right side
    478.50x = 168,624.73
  5. Step 5: Solve for x
    x = 168,624.73/478.50
  6. Step 6: Final answer
    x = 352.40

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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.