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Finding the Fourth Proportional to 532.20, 734.48 and 311.14

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Solution

The fourth proportional to 532.20, 734.48 and 311.14 is: 429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.20 : 734.48 = 311.14 : x
  2. Step 2: Convert to fraction form
    532.20/734.48 = 311.14/x
  3. Step 3: Cross multiply
    532.20x = 734.48 × 311.14
  4. Step 4: Simplify right side
    532.20x = 228,523.21
  5. Step 5: Solve for x
    x = 228,523.21/532.20
  6. Step 6: Final answer
    x = 429.40

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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.