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Finding the Fourth Proportional to 250.55, 345.78 and 145.66

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Solution

The fourth proportional to 250.55, 345.78 and 145.66 is: 201.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.55 : 345.78 = 145.66 : x
  2. Step 2: Convert to fraction form
    250.55/345.78 = 145.66/x
  3. Step 3: Cross multiply
    250.55x = 345.78 × 145.66
  4. Step 4: Simplify right side
    250.55x = 50,366.31
  5. Step 5: Solve for x
    x = 50,366.31/250.55
  6. Step 6: Final answer
    x = 201.02

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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.