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Finding the Fourth Proportional to 3,487.84, 5,231.58 and 890.62

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Solution

The fourth proportional to 3,487.84, 5,231.58 and 890.62 is: 1,335.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.84 : 5,231.58 = 890.62 : x
  2. Step 2: Convert to fraction form
    3,487.84/5,231.58 = 890.62/x
  3. Step 3: Cross multiply
    3,487.84x = 5,231.58 × 890.62
  4. Step 4: Simplify right side
    3,487.84x = 4,659,349.78
  5. Step 5: Solve for x
    x = 4,659,349.78/3,487.84
  6. Step 6: Final answer
    x = 1,335.88

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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.