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Finding the Fourth Proportional to 351,558, 485,149.80 and 190,413

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Solution

The fourth proportional to 351,558, 485,149.80 and 190,413 is: 262,769.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,558 : 485,149.80 = 190,413 : x
  2. Step 2: Convert to fraction form
    351,558/485,149.80 = 190,413/x
  3. Step 3: Cross multiply
    351,558x = 485,149.80 × 190,413
  4. Step 4: Simplify right side
    351,558x = 92,378,828,867.40
  5. Step 5: Solve for x
    x = 92,378,828,867.40/351,558
  6. Step 6: Final answer
    x = 262,769.81

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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.