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Finding the Fourth Proportional to 309.88, 464.98 and 155.92

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Solution

The fourth proportional to 309.88, 464.98 and 155.92 is: 233.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.88 : 464.98 = 155.92 : x
  2. Step 2: Convert to fraction form
    309.88/464.98 = 155.92/x
  3. Step 3: Cross multiply
    309.88x = 464.98 × 155.92
  4. Step 4: Simplify right side
    309.88x = 72,499.68
  5. Step 5: Solve for x
    x = 72,499.68/309.88
  6. Step 6: Final answer
    x = 233.96

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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.