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Finding the Fourth Proportional to 246.84, 340.66 and 143.40

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Solution

The fourth proportional to 246.84, 340.66 and 143.40 is: 197.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.84 : 340.66 = 143.40 : x
  2. Step 2: Convert to fraction form
    246.84/340.66 = 143.40/x
  3. Step 3: Cross multiply
    246.84x = 340.66 × 143.40
  4. Step 4: Simplify right side
    246.84x = 48,850.64
  5. Step 5: Solve for x
    x = 48,850.64/246.84
  6. Step 6: Final answer
    x = 197.90

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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.