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Finding the Fourth Proportional to 380.22, 524.70 and 230.85

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Solution

The fourth proportional to 380.22, 524.70 and 230.85 is: 318.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.22 : 524.70 = 230.85 : x
  2. Step 2: Convert to fraction form
    380.22/524.70 = 230.85/x
  3. Step 3: Cross multiply
    380.22x = 524.70 × 230.85
  4. Step 4: Simplify right side
    380.22x = 121,127.00
  5. Step 5: Solve for x
    x = 121,127.00/380.22
  6. Step 6: Final answer
    x = 318.57

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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.