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Finding the Fourth Proportional to 1,451.91, 2,003.90 and 822.63

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Solution

The fourth proportional to 1,451.91, 2,003.90 and 822.63 is: 1,135.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.91 : 2,003.90 = 822.63 : x
  2. Step 2: Convert to fraction form
    1,451.91/2,003.90 = 822.63/x
  3. Step 3: Cross multiply
    1,451.91x = 2,003.90 × 822.63
  4. Step 4: Simplify right side
    1,451.91x = 1,648,464.14
  5. Step 5: Solve for x
    x = 1,648,464.14/1,451.91
  6. Step 6: Final answer
    x = 1,135.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.