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Finding the Fourth Proportional to 2,062.08, 3,090.96 and 829.20

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Solution

The fourth proportional to 2,062.08, 3,090.96 and 829.20 is: 1,242.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,062.08 : 3,090.96 = 829.20 : x
  2. Step 2: Convert to fraction form
    2,062.08/3,090.96 = 829.20/x
  3. Step 3: Cross multiply
    2,062.08x = 3,090.96 × 829.20
  4. Step 4: Simplify right side
    2,062.08x = 2,563,024.03
  5. Step 5: Solve for x
    x = 2,563,024.03/2,062.08
  6. Step 6: Final answer
    x = 1,242.93

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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.