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Finding the Fourth Proportional to 306.52, 420.67 and 274.72

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Solution

The fourth proportional to 306.52, 420.67 and 274.72 is: 377.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.52 : 420.67 = 274.72 : x
  2. Step 2: Convert to fraction form
    306.52/420.67 = 274.72/x
  3. Step 3: Cross multiply
    306.52x = 420.67 × 274.72
  4. Step 4: Simplify right side
    306.52x = 115,566.46
  5. Step 5: Solve for x
    x = 115,566.46/306.52
  6. Step 6: Final answer
    x = 377.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.