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Finding the Fourth Proportional to 260.10, 390.24 and 202.68

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Solution

The fourth proportional to 260.10, 390.24 and 202.68 is: 304.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.10 : 390.24 = 202.68 : x
  2. Step 2: Convert to fraction form
    260.10/390.24 = 202.68/x
  3. Step 3: Cross multiply
    260.10x = 390.24 × 202.68
  4. Step 4: Simplify right side
    260.10x = 79,093.84
  5. Step 5: Solve for x
    x = 79,093.84/260.10
  6. Step 6: Final answer
    x = 304.09

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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.