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Finding the Fourth Proportional to 478.82, 717.63 and 204.59

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Solution

The fourth proportional to 478.82, 717.63 and 204.59 is: 306.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.82 : 717.63 = 204.59 : x
  2. Step 2: Convert to fraction form
    478.82/717.63 = 204.59/x
  3. Step 3: Cross multiply
    478.82x = 717.63 × 204.59
  4. Step 4: Simplify right side
    478.82x = 146,822.48
  5. Step 5: Solve for x
    x = 146,822.48/478.82
  6. Step 6: Final answer
    x = 306.63

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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.