Home / 686,382.70-1,028,961.68-349,234.78

Finding the Fourth Proportional to 686,382.70, 1,028,961.68 and 349,234.78

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Solution

The fourth proportional to 686,382.70, 1,028,961.68 and 349,234.78 is: 523,540.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,382.70 : 1,028,961.68 = 349,234.78 : x
  2. Step 2: Convert to fraction form
    686,382.70/1,028,961.68 = 349,234.78/x
  3. Step 3: Cross multiply
    686,382.70x = 1,028,961.68 × 349,234.78
  4. Step 4: Simplify right side
    686,382.70x = 359,349,201,671.51
  5. Step 5: Solve for x
    x = 359,349,201,671.51/686,382.70
  6. Step 6: Final answer
    x = 523,540.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.