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Finding the Fourth Proportional to 317.30, 438.03 and 219.57

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Solution

The fourth proportional to 317.30, 438.03 and 219.57 is: 303.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.30 : 438.03 = 219.57 : x
  2. Step 2: Convert to fraction form
    317.30/438.03 = 219.57/x
  3. Step 3: Cross multiply
    317.30x = 438.03 × 219.57
  4. Step 4: Simplify right side
    317.30x = 96,178.25
  5. Step 5: Solve for x
    x = 96,178.25/317.30
  6. Step 6: Final answer
    x = 303.12

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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.