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Finding the Fourth Proportional to 379.89, 524.21 and 222.48

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Solution

The fourth proportional to 379.89, 524.21 and 222.48 is: 307.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.89 : 524.21 = 222.48 : x
  2. Step 2: Convert to fraction form
    379.89/524.21 = 222.48/x
  3. Step 3: Cross multiply
    379.89x = 524.21 × 222.48
  4. Step 4: Simplify right side
    379.89x = 116,626.24
  5. Step 5: Solve for x
    x = 116,626.24/379.89
  6. Step 6: Final answer
    x = 307.00

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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.