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Finding the Fourth Proportional to 337.18, 505.75 and 207.20

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Solution

The fourth proportional to 337.18, 505.75 and 207.20 is: 310.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    337.18 : 505.75 = 207.20 : x
  2. Step 2: Convert to fraction form
    337.18/505.75 = 207.20/x
  3. Step 3: Cross multiply
    337.18x = 505.75 × 207.20
  4. Step 4: Simplify right side
    337.18x = 104,793.83
  5. Step 5: Solve for x
    x = 104,793.83/337.18
  6. Step 6: Final answer
    x = 310.79

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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.