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Finding the Fourth Proportional to 490,879.61, 736,331.94 and 135,896.69

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Solution

The fourth proportional to 490,879.61, 736,331.94 and 135,896.69 is: 203,848.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,879.61 : 736,331.94 = 135,896.69 : x
  2. Step 2: Convert to fraction form
    490,879.61/736,331.94 = 135,896.69/x
  3. Step 3: Cross multiply
    490,879.61x = 736,331.94 × 135,896.69
  4. Step 4: Simplify right side
    490,879.61x = 100,065,073,387.28
  5. Step 5: Solve for x
    x = 100,065,073,387.28/490,879.61
  6. Step 6: Final answer
    x = 203,848.50

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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.