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Finding the Fourth Proportional to 240.45, 360.74 and 103.43

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Solution

The fourth proportional to 240.45, 360.74 and 103.43 is: 155.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.45 : 360.74 = 103.43 : x
  2. Step 2: Convert to fraction form
    240.45/360.74 = 103.43/x
  3. Step 3: Cross multiply
    240.45x = 360.74 × 103.43
  4. Step 4: Simplify right side
    240.45x = 37,309.02
  5. Step 5: Solve for x
    x = 37,309.02/240.45
  6. Step 6: Final answer
    x = 155.16

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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.