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Finding the Fourth Proportional to 323.83, 485.75 and 318.67

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Solution

The fourth proportional to 323.83, 485.75 and 318.67 is: 478.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.83 : 485.75 = 318.67 : x
  2. Step 2: Convert to fraction form
    323.83/485.75 = 318.67/x
  3. Step 3: Cross multiply
    323.83x = 485.75 × 318.67
  4. Step 4: Simplify right side
    323.83x = 154,793.95
  5. Step 5: Solve for x
    x = 154,793.95/323.83
  6. Step 6: Final answer
    x = 478.01

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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.