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Finding the Fourth Proportional to 312,305.70, 430,981.38 and 169,065.72

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Solution

The fourth proportional to 312,305.70, 430,981.38 and 169,065.72 is: 233,310.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,305.70 : 430,981.38 = 169,065.72 : x
  2. Step 2: Convert to fraction form
    312,305.70/430,981.38 = 169,065.72/x
  3. Step 3: Cross multiply
    312,305.70x = 430,981.38 × 169,065.72
  4. Step 4: Simplify right side
    312,305.70x = 72,864,177,316.29
  5. Step 5: Solve for x
    x = 72,864,177,316.29/312,305.70
  6. Step 6: Final answer
    x = 233,310.43

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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.