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Finding the Fourth Proportional to 434.18, 651.61 and 228.87

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Solution

The fourth proportional to 434.18, 651.61 and 228.87 is: 343.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.18 : 651.61 = 228.87 : x
  2. Step 2: Convert to fraction form
    434.18/651.61 = 228.87/x
  3. Step 3: Cross multiply
    434.18x = 651.61 × 228.87
  4. Step 4: Simplify right side
    434.18x = 149,133.98
  5. Step 5: Solve for x
    x = 149,133.98/434.18
  6. Step 6: Final answer
    x = 343.48

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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.