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Finding the Fourth Proportional to 478.05, 716.47 and 203.87

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Solution

The fourth proportional to 478.05, 716.47 and 203.87 is: 305.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.05 : 716.47 = 203.87 : x
  2. Step 2: Convert to fraction form
    478.05/716.47 = 203.87/x
  3. Step 3: Cross multiply
    478.05x = 716.47 × 203.87
  4. Step 4: Simplify right side
    478.05x = 146,064.56
  5. Step 5: Solve for x
    x = 146,064.56/478.05
  6. Step 6: Final answer
    x = 305.54

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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.