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Finding the Fourth Proportional to 337.80, 466.20 and 305.40

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Solution

The fourth proportional to 337.80, 466.20 and 305.40 is: 421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    337.80 : 466.20 = 305.40 : x
  2. Step 2: Convert to fraction form
    337.80/466.20 = 305.40/x
  3. Step 3: Cross multiply
    337.80x = 466.20 × 305.40
  4. Step 4: Simplify right side
    337.80x = 142,377.48
  5. Step 5: Solve for x
    x = 142,377.48/337.80
  6. Step 6: Final answer
    x = 421.48

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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.