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Finding the Fourth Proportional to 2,553.04, 3,829.24 and 821.20

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Solution

The fourth proportional to 2,553.04, 3,829.24 and 821.20 is: 1,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,553.04 : 3,829.24 = 821.20 : x
  2. Step 2: Convert to fraction form
    2,553.04/3,829.24 = 821.20/x
  3. Step 3: Cross multiply
    2,553.04x = 3,829.24 × 821.20
  4. Step 4: Simplify right side
    2,553.04x = 3,144,571.89
  5. Step 5: Solve for x
    x = 3,144,571.89/2,553.04
  6. Step 6: Final answer
    x = 1,231.70

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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.