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Finding the Fourth Proportional to 429.13, 643.85 and 182.39

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Solution

The fourth proportional to 429.13, 643.85 and 182.39 is: 273.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.13 : 643.85 = 182.39 : x
  2. Step 2: Convert to fraction form
    429.13/643.85 = 182.39/x
  3. Step 3: Cross multiply
    429.13x = 643.85 × 182.39
  4. Step 4: Simplify right side
    429.13x = 117,432.50
  5. Step 5: Solve for x
    x = 117,432.50/429.13
  6. Step 6: Final answer
    x = 273.65

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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.