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Finding the Fourth Proportional to 499,745.28, 689,664.78 and 273,390.78

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Solution

The fourth proportional to 499,745.28, 689,664.78 and 273,390.78 is: 377,288.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,745.28 : 689,664.78 = 273,390.78 : x
  2. Step 2: Convert to fraction form
    499,745.28/689,664.78 = 273,390.78/x
  3. Step 3: Cross multiply
    499,745.28x = 689,664.78 × 273,390.78
  4. Step 4: Simplify right side
    499,745.28x = 188,547,992,142.73
  5. Step 5: Solve for x
    x = 188,547,992,142.73/499,745.28
  6. Step 6: Final answer
    x = 377,288.19

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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.