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Finding the Fourth Proportional to 478.02, 717.14 and 203.95

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Solution

The fourth proportional to 478.02, 717.14 and 203.95 is: 305.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.02 : 717.14 = 203.95 : x
  2. Step 2: Convert to fraction form
    478.02/717.14 = 203.95/x
  3. Step 3: Cross multiply
    478.02x = 717.14 × 203.95
  4. Step 4: Simplify right side
    478.02x = 146,260.96
  5. Step 5: Solve for x
    x = 146,260.96/478.02
  6. Step 6: Final answer
    x = 305.97

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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.