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Finding the Fourth Proportional to 315,297.96, 435,120.42 and 172,067.21

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Solution

The fourth proportional to 315,297.96, 435,120.42 and 172,067.21 is: 237,457.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,297.96 : 435,120.42 = 172,067.21 : x
  2. Step 2: Convert to fraction form
    315,297.96/435,120.42 = 172,067.21/x
  3. Step 3: Cross multiply
    315,297.96x = 435,120.42 × 172,067.21
  4. Step 4: Simplify right side
    315,297.96x = 74,869,956,683.43
  5. Step 5: Solve for x
    x = 74,869,956,683.43/315,297.96
  6. Step 6: Final answer
    x = 237,457.79

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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.