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Finding the Fourth Proportional to 312,949.56, 431,870.49 and 169,709.55

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Solution

The fourth proportional to 312,949.56, 431,870.49 and 169,709.55 is: 234,199.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,949.56 : 431,870.49 = 169,709.55 : x
  2. Step 2: Convert to fraction form
    312,949.56/431,870.49 = 169,709.55/x
  3. Step 3: Cross multiply
    312,949.56x = 431,870.49 × 169,709.55
  4. Step 4: Simplify right side
    312,949.56x = 73,292,546,516.18
  5. Step 5: Solve for x
    x = 73,292,546,516.18/312,949.56
  6. Step 6: Final answer
    x = 234,199.23

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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.