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Finding the Fourth Proportional to 383.43, 575.14 and 261.39

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Solution

The fourth proportional to 383.43, 575.14 and 261.39 is: 392.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.43 : 575.14 = 261.39 : x
  2. Step 2: Convert to fraction form
    383.43/575.14 = 261.39/x
  3. Step 3: Cross multiply
    383.43x = 575.14 × 261.39
  4. Step 4: Simplify right side
    383.43x = 150,332.97
  5. Step 5: Solve for x
    x = 150,332.97/383.43
  6. Step 6: Final answer
    x = 392.08

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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.