Home / 828,121.11-1,242,181.95-259,546.32

Finding the Fourth Proportional to 828,121.11, 1,242,181.95 and 259,546.32

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Solution

The fourth proportional to 828,121.11, 1,242,181.95 and 259,546.32 is: 389,319.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,121.11 : 1,242,181.95 = 259,546.32 : x
  2. Step 2: Convert to fraction form
    828,121.11/1,242,181.95 = 259,546.32/x
  3. Step 3: Cross multiply
    828,121.11x = 1,242,181.95 × 259,546.32
  4. Step 4: Simplify right side
    828,121.11x = 322,403,753,892.92
  5. Step 5: Solve for x
    x = 322,403,753,892.92/828,121.11
  6. Step 6: Final answer
    x = 389,319.57

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Double scale
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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.