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Finding the Fourth Proportional to 394.96, 545.18 and 270.98

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Solution

The fourth proportional to 394.96, 545.18 and 270.98 is: 374.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.96 : 545.18 = 270.98 : x
  2. Step 2: Convert to fraction form
    394.96/545.18 = 270.98/x
  3. Step 3: Cross multiply
    394.96x = 545.18 × 270.98
  4. Step 4: Simplify right side
    394.96x = 147,732.88
  5. Step 5: Solve for x
    x = 147,732.88/394.96
  6. Step 6: Final answer
    x = 374.05

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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.