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Finding the Fourth Proportional to 224.40, 309.72 and 209.01

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Solution

The fourth proportional to 224.40, 309.72 and 209.01 is: 288.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.40 : 309.72 = 209.01 : x
  2. Step 2: Convert to fraction form
    224.40/309.72 = 209.01/x
  3. Step 3: Cross multiply
    224.40x = 309.72 × 209.01
  4. Step 4: Simplify right side
    224.40x = 64,733.91
  5. Step 5: Solve for x
    x = 64,733.91/224.40
  6. Step 6: Final answer
    x = 288.48

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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.