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Finding the Fourth Proportional to 309.45, 464.37 and 155.55

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Solution

The fourth proportional to 309.45, 464.37 and 155.55 is: 233.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.45 : 464.37 = 155.55 : x
  2. Step 2: Convert to fraction form
    309.45/464.37 = 155.55/x
  3. Step 3: Cross multiply
    309.45x = 464.37 × 155.55
  4. Step 4: Simplify right side
    309.45x = 72,232.75
  5. Step 5: Solve for x
    x = 72,232.75/309.45
  6. Step 6: Final answer
    x = 233.42

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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.