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Finding the Fourth Proportional to 312,864.60, 431,755.20 and 169,626.84

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Solution

The fourth proportional to 312,864.60, 431,755.20 and 169,626.84 is: 234,086.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,864.60 : 431,755.20 = 169,626.84 : x
  2. Step 2: Convert to fraction form
    312,864.60/431,755.20 = 169,626.84/x
  3. Step 3: Cross multiply
    312,864.60x = 431,755.20 × 169,626.84
  4. Step 4: Simplify right side
    312,864.60x = 73,237,270,229.57
  5. Step 5: Solve for x
    x = 73,237,270,229.57/312,864.60
  6. Step 6: Final answer
    x = 234,086.15

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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.