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Finding the Fourth Proportional to 155.44, 213.88 and 151.40

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Solution

The fourth proportional to 155.44, 213.88 and 151.40 is: 208.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.44 : 213.88 = 151.40 : x
  2. Step 2: Convert to fraction form
    155.44/213.88 = 151.40/x
  3. Step 3: Cross multiply
    155.44x = 213.88 × 151.40
  4. Step 4: Simplify right side
    155.44x = 32,381.43
  5. Step 5: Solve for x
    x = 32,381.43/155.44
  6. Step 6: Final answer
    x = 208.32

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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.