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Finding the Fourth Proportional to 210.08, 288.20 and 204.39

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Solution

The fourth proportional to 210.08, 288.20 and 204.39 is: 280.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.08 : 288.20 = 204.39 : x
  2. Step 2: Convert to fraction form
    210.08/288.20 = 204.39/x
  3. Step 3: Cross multiply
    210.08x = 288.20 × 204.39
  4. Step 4: Simplify right side
    210.08x = 58,905.20
  5. Step 5: Solve for x
    x = 58,905.20/210.08
  6. Step 6: Final answer
    x = 280.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.