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Finding the Fourth Proportional to 434.64, 651.96 and 126.48

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Solution

The fourth proportional to 434.64, 651.96 and 126.48 is: 189.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.64 : 651.96 = 126.48 : x
  2. Step 2: Convert to fraction form
    434.64/651.96 = 126.48/x
  3. Step 3: Cross multiply
    434.64x = 651.96 × 126.48
  4. Step 4: Simplify right side
    434.64x = 82,459.90
  5. Step 5: Solve for x
    x = 82,459.90/434.64
  6. Step 6: Final answer
    x = 189.72

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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.