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Finding the Fourth Proportional to 1,331.34, 1,997.23 and 591.21

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Solution

The fourth proportional to 1,331.34, 1,997.23 and 591.21 is: 886.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.34 : 1,997.23 = 591.21 : x
  2. Step 2: Convert to fraction form
    1,331.34/1,997.23 = 591.21/x
  3. Step 3: Cross multiply
    1,331.34x = 1,997.23 × 591.21
  4. Step 4: Simplify right side
    1,331.34x = 1,180,783.16
  5. Step 5: Solve for x
    x = 1,180,783.16/1,331.34
  6. Step 6: Final answer
    x = 886.91

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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.