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Finding the Fourth Proportional to 308,563.29, 425,856.78 and 172,604.79

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Solution

The fourth proportional to 308,563.29, 425,856.78 and 172,604.79 is: 238,216.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,563.29 : 425,856.78 = 172,604.79 : x
  2. Step 2: Convert to fraction form
    308,563.29/425,856.78 = 172,604.79/x
  3. Step 3: Cross multiply
    308,563.29x = 425,856.78 × 172,604.79
  4. Step 4: Simplify right side
    308,563.29x = 73,504,920,081.98
  5. Step 5: Solve for x
    x = 73,504,920,081.98/308,563.29
  6. Step 6: Final answer
    x = 238,216.67

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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.