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Finding the Fourth Proportional to 339.96, 469.89 and 274.35

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Solution

The fourth proportional to 339.96, 469.89 and 274.35 is: 379.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.96 : 469.89 = 274.35 : x
  2. Step 2: Convert to fraction form
    339.96/469.89 = 274.35/x
  3. Step 3: Cross multiply
    339.96x = 469.89 × 274.35
  4. Step 4: Simplify right side
    339.96x = 128,914.32
  5. Step 5: Solve for x
    x = 128,914.32/339.96
  6. Step 6: Final answer
    x = 379.20

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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.