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Finding the Fourth Proportional to 1,331.60, 1,997.21 and 357.62

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Solution

The fourth proportional to 1,331.60, 1,997.21 and 357.62 is: 536.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.60 : 1,997.21 = 357.62 : x
  2. Step 2: Convert to fraction form
    1,331.60/1,997.21 = 357.62/x
  3. Step 3: Cross multiply
    1,331.60x = 1,997.21 × 357.62
  4. Step 4: Simplify right side
    1,331.60x = 714,233.15
  5. Step 5: Solve for x
    x = 714,233.15/1,331.60
  6. Step 6: Final answer
    x = 536.37

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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.