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Finding the Fourth Proportional to 315,993.38, 436,053.21 and 172,724.90

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Solution

The fourth proportional to 315,993.38, 436,053.21 and 172,724.90 is: 238,350.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,993.38 : 436,053.21 = 172,724.90 : x
  2. Step 2: Convert to fraction form
    315,993.38/436,053.21 = 172,724.90/x
  3. Step 3: Cross multiply
    315,993.38x = 436,053.21 × 172,724.90
  4. Step 4: Simplify right side
    315,993.38x = 75,317,247,091.93
  5. Step 5: Solve for x
    x = 75,317,247,091.93/315,993.38
  6. Step 6: Final answer
    x = 238,350.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.