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Finding the Fourth Proportional to 312,392.62, 431,109.71 and 191,600.50

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Solution

The fourth proportional to 312,392.62, 431,109.71 and 191,600.50 is: 264,413.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,392.62 : 431,109.71 = 191,600.50 : x
  2. Step 2: Convert to fraction form
    312,392.62/431,109.71 = 191,600.50/x
  3. Step 3: Cross multiply
    312,392.62x = 431,109.71 × 191,600.50
  4. Step 4: Simplify right side
    312,392.62x = 82,600,835,990.86
  5. Step 5: Solve for x
    x = 82,600,835,990.86/312,392.62
  6. Step 6: Final answer
    x = 264,413.53

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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.