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Finding the Fourth Proportional to 246.45, 339.84 and 157.89

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Solution

The fourth proportional to 246.45, 339.84 and 157.89 is: 217.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.45 : 339.84 = 157.89 : x
  2. Step 2: Convert to fraction form
    246.45/339.84 = 157.89/x
  3. Step 3: Cross multiply
    246.45x = 339.84 × 157.89
  4. Step 4: Simplify right side
    246.45x = 53,657.34
  5. Step 5: Solve for x
    x = 53,657.34/246.45
  6. Step 6: Final answer
    x = 217.72

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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.