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Finding the Fourth Proportional to 309.86, 464.36 and 155.82

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Solution

The fourth proportional to 309.86, 464.36 and 155.82 is: 233.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.86 : 464.36 = 155.82 : x
  2. Step 2: Convert to fraction form
    309.86/464.36 = 155.82/x
  3. Step 3: Cross multiply
    309.86x = 464.36 × 155.82
  4. Step 4: Simplify right side
    309.86x = 72,355.80
  5. Step 5: Solve for x
    x = 72,355.80/309.86
  6. Step 6: Final answer
    x = 233.52

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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.