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Finding the Fourth Proportional to 383.57, 529.32 and 208.91

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Solution

The fourth proportional to 383.57, 529.32 and 208.91 is: 288.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.57 : 529.32 = 208.91 : x
  2. Step 2: Convert to fraction form
    383.57/529.32 = 208.91/x
  3. Step 3: Cross multiply
    383.57x = 529.32 × 208.91
  4. Step 4: Simplify right side
    383.57x = 110,576.55
  5. Step 5: Solve for x
    x = 110,576.55/383.57
  6. Step 6: Final answer
    x = 288.29

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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.