Home / 1,331.45-1,997.10-406.99

Finding the Fourth Proportional to 1,331.45, 1,997.10 and 406.99

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Solution

The fourth proportional to 1,331.45, 1,997.10 and 406.99 is: 610.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.45 : 1,997.10 = 406.99 : x
  2. Step 2: Convert to fraction form
    1,331.45/1,997.10 = 406.99/x
  3. Step 3: Cross multiply
    1,331.45x = 1,997.10 × 406.99
  4. Step 4: Simplify right side
    1,331.45x = 812,799.73
  5. Step 5: Solve for x
    x = 812,799.73/1,331.45
  6. Step 6: Final answer
    x = 610.46

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Double scale
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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.