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Finding the Fourth Proportional to 360.05, 540.58 and 206.28

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Solution

The fourth proportional to 360.05, 540.58 and 206.28 is: 309.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.05 : 540.58 = 206.28 : x
  2. Step 2: Convert to fraction form
    360.05/540.58 = 206.28/x
  3. Step 3: Cross multiply
    360.05x = 540.58 × 206.28
  4. Step 4: Simplify right side
    360.05x = 111,510.84
  5. Step 5: Solve for x
    x = 111,510.84/360.05
  6. Step 6: Final answer
    x = 309.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.