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Finding the Fourth Proportional to 312,990.08, 431,981.52 and 185,735.84

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Solution

The fourth proportional to 312,990.08, 431,981.52 and 185,735.84 is: 256,348.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,990.08 : 431,981.52 = 185,735.84 : x
  2. Step 2: Convert to fraction form
    312,990.08/431,981.52 = 185,735.84/x
  3. Step 3: Cross multiply
    312,990.08x = 431,981.52 × 185,735.84
  4. Step 4: Simplify right side
    312,990.08x = 80,234,450,481.68
  5. Step 5: Solve for x
    x = 80,234,450,481.68/312,990.08
  6. Step 6: Final answer
    x = 256,348.22

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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.