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Finding the Fourth Proportional to 155.48, 213.91 and 151.83

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Solution

The fourth proportional to 155.48, 213.91 and 151.83 is: 208.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.48 : 213.91 = 151.83 : x
  2. Step 2: Convert to fraction form
    155.48/213.91 = 151.83/x
  3. Step 3: Cross multiply
    155.48x = 213.91 × 151.83
  4. Step 4: Simplify right side
    155.48x = 32,477.58
  5. Step 5: Solve for x
    x = 32,477.58/155.48
  6. Step 6: Final answer
    x = 208.89

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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.