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Finding the Fourth Proportional to 2,553.44, 3,829.32 and 821.64

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Solution

The fourth proportional to 2,553.44, 3,829.32 and 821.64 is: 1,232.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,553.44 : 3,829.32 = 821.64 : x
  2. Step 2: Convert to fraction form
    2,553.44/3,829.32 = 821.64/x
  3. Step 3: Cross multiply
    2,553.44x = 3,829.32 × 821.64
  4. Step 4: Simplify right side
    2,553.44x = 3,146,322.48
  5. Step 5: Solve for x
    x = 3,146,322.48/2,553.44
  6. Step 6: Final answer
    x = 1,232.19

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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.