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Finding the Fourth Proportional to 483.57, 725.05 and 318.86

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Solution

The fourth proportional to 483.57, 725.05 and 318.86 is: 478.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.57 : 725.05 = 318.86 : x
  2. Step 2: Convert to fraction form
    483.57/725.05 = 318.86/x
  3. Step 3: Cross multiply
    483.57x = 725.05 × 318.86
  4. Step 4: Simplify right side
    483.57x = 231,190.97
  5. Step 5: Solve for x
    x = 231,190.97/483.57
  6. Step 6: Final answer
    x = 478.09

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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.