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Finding the Fourth Proportional to 155.55, 233.52 and 143.80

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Solution

The fourth proportional to 155.55, 233.52 and 143.80 is: 215.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.55 : 233.52 = 143.80 : x
  2. Step 2: Convert to fraction form
    155.55/233.52 = 143.80/x
  3. Step 3: Cross multiply
    155.55x = 233.52 × 143.80
  4. Step 4: Simplify right side
    155.55x = 33,580.18
  5. Step 5: Solve for x
    x = 33,580.18/155.55
  6. Step 6: Final answer
    x = 215.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.