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Finding the Fourth Proportional to 394.98, 545.32 and 301.56

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Solution

The fourth proportional to 394.98, 545.32 and 301.56 is: 416.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.98 : 545.32 = 301.56 : x
  2. Step 2: Convert to fraction form
    394.98/545.32 = 301.56/x
  3. Step 3: Cross multiply
    394.98x = 545.32 × 301.56
  4. Step 4: Simplify right side
    394.98x = 164,446.70
  5. Step 5: Solve for x
    x = 164,446.70/394.98
  6. Step 6: Final answer
    x = 416.34

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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.