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Finding the Fourth Proportional to 380.76, 570.12 and 243.39

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Solution

The fourth proportional to 380.76, 570.12 and 243.39 is: 364.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.76 : 570.12 = 243.39 : x
  2. Step 2: Convert to fraction form
    380.76/570.12 = 243.39/x
  3. Step 3: Cross multiply
    380.76x = 570.12 × 243.39
  4. Step 4: Simplify right side
    380.76x = 138,762.73
  5. Step 5: Solve for x
    x = 138,762.73/380.76
  6. Step 6: Final answer
    x = 364.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.