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Finding the Fourth Proportional to 383.66, 529.43 and 209.00

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Solution

The fourth proportional to 383.66, 529.43 and 209.00 is: 288.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.66 : 529.43 = 209.00 : x
  2. Step 2: Convert to fraction form
    383.66/529.43 = 209.00/x
  3. Step 3: Cross multiply
    383.66x = 529.43 × 209.00
  4. Step 4: Simplify right side
    383.66x = 110,651.93
  5. Step 5: Solve for x
    x = 110,651.93/383.66
  6. Step 6: Final answer
    x = 288.41

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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.