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Finding the Fourth Proportional to 434.12, 651.45 and 228.84

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Solution

The fourth proportional to 434.12, 651.45 and 228.84 is: 343.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.12 : 651.45 = 228.84 : x
  2. Step 2: Convert to fraction form
    434.12/651.45 = 228.84/x
  3. Step 3: Cross multiply
    434.12x = 651.45 × 228.84
  4. Step 4: Simplify right side
    434.12x = 149,073.42
  5. Step 5: Solve for x
    x = 149,073.42/434.12
  6. Step 6: Final answer
    x = 343.39

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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.