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Finding the Fourth Proportional to 478.72, 716.88 and 333.76

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Solution

The fourth proportional to 478.72, 716.88 and 333.76 is: 499.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.72 : 716.88 = 333.76 : x
  2. Step 2: Convert to fraction form
    478.72/716.88 = 333.76/x
  3. Step 3: Cross multiply
    478.72x = 716.88 × 333.76
  4. Step 4: Simplify right side
    478.72x = 239,265.87
  5. Step 5: Solve for x
    x = 239,265.87/478.72
  6. Step 6: Final answer
    x = 499.80

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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.