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Finding the Fourth Proportional to 394.30, 543.55 and 300.88

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Solution

The fourth proportional to 394.30, 543.55 and 300.88 is: 414.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.30 : 543.55 = 300.88 : x
  2. Step 2: Convert to fraction form
    394.30/543.55 = 300.88/x
  3. Step 3: Cross multiply
    394.30x = 543.55 × 300.88
  4. Step 4: Simplify right side
    394.30x = 163,543.32
  5. Step 5: Solve for x
    x = 163,543.32/394.30
  6. Step 6: Final answer
    x = 414.77

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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.