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Finding the Fourth Proportional to 372.17, 513.64 and 222.72

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Solution

The fourth proportional to 372.17, 513.64 and 222.72 is: 307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.17 : 513.64 = 222.72 : x
  2. Step 2: Convert to fraction form
    372.17/513.64 = 222.72/x
  3. Step 3: Cross multiply
    372.17x = 513.64 × 222.72
  4. Step 4: Simplify right side
    372.17x = 114,400.59
  5. Step 5: Solve for x
    x = 114,400.59/372.17
  6. Step 6: Final answer
    x = 307.39

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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.