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Finding the Fourth Proportional to 309,487.45, 427,082.85 and 173,529.17

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Solution

The fourth proportional to 309,487.45, 427,082.85 and 173,529.17 is: 239,464.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,487.45 : 427,082.85 = 173,529.17 : x
  2. Step 2: Convert to fraction form
    309,487.45/427,082.85 = 173,529.17/x
  3. Step 3: Cross multiply
    309,487.45x = 427,082.85 × 173,529.17
  4. Step 4: Simplify right side
    309,487.45x = 74,111,332,481.73
  5. Step 5: Solve for x
    x = 74,111,332,481.73/309,487.45
  6. Step 6: Final answer
    x = 239,464.74

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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.