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Finding the Fourth Proportional to 380.13, 524.55 and 222.84

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Solution

The fourth proportional to 380.13, 524.55 and 222.84 is: 307.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.13 : 524.55 = 222.84 : x
  2. Step 2: Convert to fraction form
    380.13/524.55 = 222.84/x
  3. Step 3: Cross multiply
    380.13x = 524.55 × 222.84
  4. Step 4: Simplify right side
    380.13x = 116,890.72
  5. Step 5: Solve for x
    x = 116,890.72/380.13
  6. Step 6: Final answer
    x = 307.50

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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.