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Finding the Fourth Proportional to 338.07, 506.45 and 207.69

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Solution

The fourth proportional to 338.07, 506.45 and 207.69 is: 311.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.07 : 506.45 = 207.69 : x
  2. Step 2: Convert to fraction form
    338.07/506.45 = 207.69/x
  3. Step 3: Cross multiply
    338.07x = 506.45 × 207.69
  4. Step 4: Simplify right side
    338.07x = 105,184.60
  5. Step 5: Solve for x
    x = 105,184.60/338.07
  6. Step 6: Final answer
    x = 311.13

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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.