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Finding the Fourth Proportional to 532.08, 734.44 and 311.20

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Solution

The fourth proportional to 532.08, 734.44 and 311.20 is: 429.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.08 : 734.44 = 311.20 : x
  2. Step 2: Convert to fraction form
    532.08/734.44 = 311.20/x
  3. Step 3: Cross multiply
    532.08x = 734.44 × 311.20
  4. Step 4: Simplify right side
    532.08x = 228,557.73
  5. Step 5: Solve for x
    x = 228,557.73/532.08
  6. Step 6: Final answer
    x = 429.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.