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Finding the Fourth Proportional to 246.20, 369.18 and 72.80

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Solution

The fourth proportional to 246.20, 369.18 and 72.80 is: 109.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.20 : 369.18 = 72.80 : x
  2. Step 2: Convert to fraction form
    246.20/369.18 = 72.80/x
  3. Step 3: Cross multiply
    246.20x = 369.18 × 72.80
  4. Step 4: Simplify right side
    246.20x = 26,877.60
  5. Step 5: Solve for x
    x = 26,877.60/246.20
  6. Step 6: Final answer
    x = 109.17

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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.