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Finding the Fourth Proportional to 383.69, 529.79 and 251.00

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Solution

The fourth proportional to 383.69, 529.79 and 251.00 is: 346.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.69 : 529.79 = 251.00 : x
  2. Step 2: Convert to fraction form
    383.69/529.79 = 251.00/x
  3. Step 3: Cross multiply
    383.69x = 529.79 × 251.00
  4. Step 4: Simplify right side
    383.69x = 132,976.78
  5. Step 5: Solve for x
    x = 132,976.78/383.69
  6. Step 6: Final answer
    x = 346.58

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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.