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Finding the Fourth Proportional to 383.38, 529.07 and 208.72

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Solution

The fourth proportional to 383.38, 529.07 and 208.72 is: 288.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.38 : 529.07 = 208.72 : x
  2. Step 2: Convert to fraction form
    383.38/529.07 = 208.72/x
  3. Step 3: Cross multiply
    383.38x = 529.07 × 208.72
  4. Step 4: Simplify right side
    383.38x = 110,427.85
  5. Step 5: Solve for x
    x = 110,427.85/383.38
  6. Step 6: Final answer
    x = 288.04

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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.