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Finding the Fourth Proportional to 532.63, 734.96 and 311.55

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Solution

The fourth proportional to 532.63, 734.96 and 311.55 is: 429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.63 : 734.96 = 311.55 : x
  2. Step 2: Convert to fraction form
    532.63/734.96 = 311.55/x
  3. Step 3: Cross multiply
    532.63x = 734.96 × 311.55
  4. Step 4: Simplify right side
    532.63x = 228,977.57
  5. Step 5: Solve for x
    x = 228,977.57/532.63
  6. Step 6: Final answer
    x = 429.90

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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.