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Finding the Fourth Proportional to 548.85, 823.45 and 317.71

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Solution

The fourth proportional to 548.85, 823.45 and 317.71 is: 476.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.85 : 823.45 = 317.71 : x
  2. Step 2: Convert to fraction form
    548.85/823.45 = 317.71/x
  3. Step 3: Cross multiply
    548.85x = 823.45 × 317.71
  4. Step 4: Simplify right side
    548.85x = 261,618.30
  5. Step 5: Solve for x
    x = 261,618.30/548.85
  6. Step 6: Final answer
    x = 476.67

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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.