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Finding the Fourth Proportional to 260.20, 358.91 and 155.27

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Solution

The fourth proportional to 260.20, 358.91 and 155.27 is: 214.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.20 : 358.91 = 155.27 : x
  2. Step 2: Convert to fraction form
    260.20/358.91 = 155.27/x
  3. Step 3: Cross multiply
    260.20x = 358.91 × 155.27
  4. Step 4: Simplify right side
    260.20x = 55,726.55
  5. Step 5: Solve for x
    x = 55,726.55/260.20
  6. Step 6: Final answer
    x = 214.17

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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.