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Finding the Fourth Proportional to 3,487.46, 5,231.18 and 890.39

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Solution

The fourth proportional to 3,487.46, 5,231.18 and 890.39 is: 1,335.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.46 : 5,231.18 = 890.39 : x
  2. Step 2: Convert to fraction form
    3,487.46/5,231.18 = 890.39/x
  3. Step 3: Cross multiply
    3,487.46x = 5,231.18 × 890.39
  4. Step 4: Simplify right side
    3,487.46x = 4,657,805.66
  5. Step 5: Solve for x
    x = 4,657,805.66/3,487.46
  6. Step 6: Final answer
    x = 1,335.59

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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.