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Finding the Fourth Proportional to 246.98, 370.31 and 138.74

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Solution

The fourth proportional to 246.98, 370.31 and 138.74 is: 208.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.98 : 370.31 = 138.74 : x
  2. Step 2: Convert to fraction form
    246.98/370.31 = 138.74/x
  3. Step 3: Cross multiply
    246.98x = 370.31 × 138.74
  4. Step 4: Simplify right side
    246.98x = 51,374.26
  5. Step 5: Solve for x
    x = 51,374.26/246.98
  6. Step 6: Final answer
    x = 208.01

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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.