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Finding the Fourth Proportional to 305,149.43, 421,084.12 and 167,306.28

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Solution

The fourth proportional to 305,149.43, 421,084.12 and 167,306.28 is: 230,870.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,149.43 : 421,084.12 = 167,306.28 : x
  2. Step 2: Convert to fraction form
    305,149.43/421,084.12 = 167,306.28/x
  3. Step 3: Cross multiply
    305,149.43x = 421,084.12 × 167,306.28
  4. Step 4: Simplify right side
    305,149.43x = 70,450,019,553.54
  5. Step 5: Solve for x
    x = 70,450,019,553.54/305,149.43
  6. Step 6: Final answer
    x = 230,870.56

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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.