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Finding the Fourth Proportional to 315,298.68, 435,121.43 and 172,067.96

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Solution

The fourth proportional to 315,298.68, 435,121.43 and 172,067.96 is: 237,458.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,298.68 : 435,121.43 = 172,067.96 : x
  2. Step 2: Convert to fraction form
    315,298.68/435,121.43 = 172,067.96/x
  3. Step 3: Cross multiply
    315,298.68x = 435,121.43 × 172,067.96
  4. Step 4: Simplify right side
    315,298.68x = 74,870,456,812.38
  5. Step 5: Solve for x
    x = 74,870,456,812.38/315,298.68
  6. Step 6: Final answer
    x = 237,458.83

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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.