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Finding the Fourth Proportional to 155.25, 215.26 and 154.58

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Solution

The fourth proportional to 155.25, 215.26 and 154.58 is: 214.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.25 : 215.26 = 154.58 : x
  2. Step 2: Convert to fraction form
    155.25/215.26 = 154.58/x
  3. Step 3: Cross multiply
    155.25x = 215.26 × 154.58
  4. Step 4: Simplify right side
    155.25x = 33,273.43
  5. Step 5: Solve for x
    x = 33,273.43/155.25
  6. Step 6: Final answer
    x = 214.32

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.