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Finding the Fourth Proportional to 478.17, 717.32 and 204.25

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Solution

The fourth proportional to 478.17, 717.32 and 204.25 is: 306.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.17 : 717.32 = 204.25 : x
  2. Step 2: Convert to fraction form
    478.17/717.32 = 204.25/x
  3. Step 3: Cross multiply
    478.17x = 717.32 × 204.25
  4. Step 4: Simplify right side
    478.17x = 146,512.61
  5. Step 5: Solve for x
    x = 146,512.61/478.17
  6. Step 6: Final answer
    x = 306.40

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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.