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Finding the Fourth Proportional to 155.82, 213.90 and 148.80

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Solution

The fourth proportional to 155.82, 213.90 and 148.80 is: 204.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.82 : 213.90 = 148.80 : x
  2. Step 2: Convert to fraction form
    155.82/213.90 = 148.80/x
  3. Step 3: Cross multiply
    155.82x = 213.90 × 148.80
  4. Step 4: Simplify right side
    155.82x = 31,828.32
  5. Step 5: Solve for x
    x = 31,828.32/155.82
  6. Step 6: Final answer
    x = 204.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.