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Finding the Fourth Proportional to 3,621.62, 5,432.44 and 989.14

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Solution

The fourth proportional to 3,621.62, 5,432.44 and 989.14 is: 1,483.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.62 : 5,432.44 = 989.14 : x
  2. Step 2: Convert to fraction form
    3,621.62/5,432.44 = 989.14/x
  3. Step 3: Cross multiply
    3,621.62x = 5,432.44 × 989.14
  4. Step 4: Simplify right side
    3,621.62x = 5,373,443.70
  5. Step 5: Solve for x
    x = 5,373,443.70/3,621.62
  6. Step 6: Final answer
    x = 1,483.71

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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.