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Finding the Fourth Proportional to 3,622.60, 5,433.54 and 990.34

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Solution

The fourth proportional to 3,622.60, 5,433.54 and 990.34 is: 1,485.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,622.60 : 5,433.54 = 990.34 : x
  2. Step 2: Convert to fraction form
    3,622.60/5,433.54 = 990.34/x
  3. Step 3: Cross multiply
    3,622.60x = 5,433.54 × 990.34
  4. Step 4: Simplify right side
    3,622.60x = 5,381,073.53
  5. Step 5: Solve for x
    x = 5,381,073.53/3,622.60
  6. Step 6: Final answer
    x = 1,485.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.