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Finding the Fourth Proportional to 339.80, 469.40 and 302.94

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Solution

The fourth proportional to 339.80, 469.40 and 302.94 is: 418.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.80 : 469.40 = 302.94 : x
  2. Step 2: Convert to fraction form
    339.80/469.40 = 302.94/x
  3. Step 3: Cross multiply
    339.80x = 469.40 × 302.94
  4. Step 4: Simplify right side
    339.80x = 142,198.52
  5. Step 5: Solve for x
    x = 142,198.52/339.80
  6. Step 6: Final answer
    x = 418.48

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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.