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Finding the Fourth Proportional to 315,793.69, 435,790.09 and 172,550.65

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Solution

The fourth proportional to 315,793.69, 435,790.09 and 172,550.65 is: 238,117.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,793.69 : 435,790.09 = 172,550.65 : x
  2. Step 2: Convert to fraction form
    315,793.69/435,790.09 = 172,550.65/x
  3. Step 3: Cross multiply
    315,793.69x = 435,790.09 × 172,550.65
  4. Step 4: Simplify right side
    315,793.69x = 75,195,863,293.06
  5. Step 5: Solve for x
    x = 75,195,863,293.06/315,793.69
  6. Step 6: Final answer
    x = 238,117.05

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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.