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Finding the Fourth Proportional to 379.87, 524.28 and 222.59

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Solution

The fourth proportional to 379.87, 524.28 and 222.59 is: 307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.87 : 524.28 = 222.59 : x
  2. Step 2: Convert to fraction form
    379.87/524.28 = 222.59/x
  3. Step 3: Cross multiply
    379.87x = 524.28 × 222.59
  4. Step 4: Simplify right side
    379.87x = 116,699.49
  5. Step 5: Solve for x
    x = 116,699.49/379.87
  6. Step 6: Final answer
    x = 307.21

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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.