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Finding the Fourth Proportional to 363.80, 545.60 and 103.74

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Solution

The fourth proportional to 363.80, 545.60 and 103.74 is: 155.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.80 : 545.60 = 103.74 : x
  2. Step 2: Convert to fraction form
    363.80/545.60 = 103.74/x
  3. Step 3: Cross multiply
    363.80x = 545.60 × 103.74
  4. Step 4: Simplify right side
    363.80x = 56,600.03
  5. Step 5: Solve for x
    x = 56,600.03/363.80
  6. Step 6: Final answer
    x = 155.58

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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.