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Finding the Fourth Proportional to 2,908.96, 4,363.44 and 829.20

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Solution

The fourth proportional to 2,908.96, 4,363.44 and 829.20 is: 1,243.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908.96 : 4,363.44 = 829.20 : x
  2. Step 2: Convert to fraction form
    2,908.96/4,363.44 = 829.20/x
  3. Step 3: Cross multiply
    2,908.96x = 4,363.44 × 829.20
  4. Step 4: Simplify right side
    2,908.96x = 3,618,164.45
  5. Step 5: Solve for x
    x = 3,618,164.45/2,908.96
  6. Step 6: Final answer
    x = 1,243.80

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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.