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Finding the Fourth Proportional to 318.92, 480.35 and 303.56

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Solution

The fourth proportional to 318.92, 480.35 and 303.56 is: 457.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.92 : 480.35 = 303.56 : x
  2. Step 2: Convert to fraction form
    318.92/480.35 = 303.56/x
  3. Step 3: Cross multiply
    318.92x = 480.35 × 303.56
  4. Step 4: Simplify right side
    318.92x = 145,815.05
  5. Step 5: Solve for x
    x = 145,815.05/318.92
  6. Step 6: Final answer
    x = 457.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.