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Finding the Fourth Proportional to 317.71, 438.61 and 224.54

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Solution

The fourth proportional to 317.71, 438.61 and 224.54 is: 309.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.71 : 438.61 = 224.54 : x
  2. Step 2: Convert to fraction form
    317.71/438.61 = 224.54/x
  3. Step 3: Cross multiply
    317.71x = 438.61 × 224.54
  4. Step 4: Simplify right side
    317.71x = 98,485.49
  5. Step 5: Solve for x
    x = 98,485.49/317.71
  6. Step 6: Final answer
    x = 309.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.