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Finding the Fourth Proportional to 351,866.58, 485,190.74 and 261,390.39

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Solution

The fourth proportional to 351,866.58, 485,190.74 and 261,390.39 is: 360,432.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,866.58 : 485,190.74 = 261,390.39 : x
  2. Step 2: Convert to fraction form
    351,866.58/485,190.74 = 261,390.39/x
  3. Step 3: Cross multiply
    351,866.58x = 485,190.74 × 261,390.39
  4. Step 4: Simplify right side
    351,866.58x = 126,824,196,752.99
  5. Step 5: Solve for x
    x = 126,824,196,752.99/351,866.58
  6. Step 6: Final answer
    x = 360,432.63

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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.