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Finding the Fourth Proportional to 3,990.67, 5,503.04 and 3,432.98

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Solution

The fourth proportional to 3,990.67, 5,503.04 and 3,432.98 is: 4,734.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.67 : 5,503.04 = 3,432.98 : x
  2. Step 2: Convert to fraction form
    3,990.67/5,503.04 = 3,432.98/x
  3. Step 3: Cross multiply
    3,990.67x = 5,503.04 × 3,432.98
  4. Step 4: Simplify right side
    3,990.67x = 18,891,835.73
  5. Step 5: Solve for x
    x = 18,891,835.73/3,990.67
  6. Step 6: Final answer
    x = 4,734.00

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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.