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Finding the Fourth Proportional to 532.50, 734.61 and 311.35

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Solution

The fourth proportional to 532.50, 734.61 and 311.35 is: 429.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.50 : 734.61 = 311.35 : x
  2. Step 2: Convert to fraction form
    532.50/734.61 = 311.35/x
  3. Step 3: Cross multiply
    532.50x = 734.61 × 311.35
  4. Step 4: Simplify right side
    532.50x = 228,720.57
  5. Step 5: Solve for x
    x = 228,720.57/532.50
  6. Step 6: Final answer
    x = 429.53

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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.