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Finding the Fourth Proportional to 434.54, 651.82 and 126.44

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Solution

The fourth proportional to 434.54, 651.82 and 126.44 is: 189.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.54 : 651.82 = 126.44 : x
  2. Step 2: Convert to fraction form
    434.54/651.82 = 126.44/x
  3. Step 3: Cross multiply
    434.54x = 651.82 × 126.44
  4. Step 4: Simplify right side
    434.54x = 82,416.12
  5. Step 5: Solve for x
    x = 82,416.12/434.54
  6. Step 6: Final answer
    x = 189.66

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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.