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Finding the Fourth Proportional to 480.94, 721.40 and 316.71

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Solution

The fourth proportional to 480.94, 721.40 and 316.71 is: 475.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.94 : 721.40 = 316.71 : x
  2. Step 2: Convert to fraction form
    480.94/721.40 = 316.71/x
  3. Step 3: Cross multiply
    480.94x = 721.40 × 316.71
  4. Step 4: Simplify right side
    480.94x = 228,474.59
  5. Step 5: Solve for x
    x = 228,474.59/480.94
  6. Step 6: Final answer
    x = 475.06

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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.