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Finding the Fourth Proportional to 509,173.87, 702,660.23 and 279,745.95

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Solution

The fourth proportional to 509,173.87, 702,660.23 and 279,745.95 is: 386,049.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,173.87 : 702,660.23 = 279,745.95 : x
  2. Step 2: Convert to fraction form
    509,173.87/702,660.23 = 279,745.95/x
  3. Step 3: Cross multiply
    509,173.87x = 702,660.23 × 279,745.95
  4. Step 4: Simplify right side
    509,173.87x = 196,566,353,568.57
  5. Step 5: Solve for x
    x = 196,566,353,568.57/509,173.87
  6. Step 6: Final answer
    x = 386,049.57

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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.