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Finding the Fourth Proportional to 317.99, 477.17 and 144.67

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Solution

The fourth proportional to 317.99, 477.17 and 144.67 is: 217.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.99 : 477.17 = 144.67 : x
  2. Step 2: Convert to fraction form
    317.99/477.17 = 144.67/x
  3. Step 3: Cross multiply
    317.99x = 477.17 × 144.67
  4. Step 4: Simplify right side
    317.99x = 69,032.18
  5. Step 5: Solve for x
    x = 69,032.18/317.99
  6. Step 6: Final answer
    x = 217.09

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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.