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Finding the Fourth Proportional to 302.72, 415.84 and 247.30

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Solution

The fourth proportional to 302.72, 415.84 and 247.30 is: 339.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.72 : 415.84 = 247.30 : x
  2. Step 2: Convert to fraction form
    302.72/415.84 = 247.30/x
  3. Step 3: Cross multiply
    302.72x = 415.84 × 247.30
  4. Step 4: Simplify right side
    302.72x = 102,837.23
  5. Step 5: Solve for x
    x = 102,837.23/302.72
  6. Step 6: Final answer
    x = 339.71

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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.