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Finding the Fourth Proportional to 209.01, 312.02 and 201.80

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Solution

The fourth proportional to 209.01, 312.02 and 201.80 is: 301.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.01 : 312.02 = 201.80 : x
  2. Step 2: Convert to fraction form
    209.01/312.02 = 201.80/x
  3. Step 3: Cross multiply
    209.01x = 312.02 × 201.80
  4. Step 4: Simplify right side
    209.01x = 62,963.07
  5. Step 5: Solve for x
    x = 62,963.07/209.01
  6. Step 6: Final answer
    x = 301.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.