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Finding the Fourth Proportional to 464,879.28, 641,405.88 and 283,620.72

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Solution

The fourth proportional to 464,879.28, 641,405.88 and 283,620.72 is: 391,318.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    464,879.28 : 641,405.88 = 283,620.72 : x
  2. Step 2: Convert to fraction form
    464,879.28/641,405.88 = 283,620.72/x
  3. Step 3: Cross multiply
    464,879.28x = 641,405.88 × 283,620.72
  4. Step 4: Simplify right side
    464,879.28x = 181,915,997,497.83
  5. Step 5: Solve for x
    x = 181,915,997,497.83/464,879.28
  6. Step 6: Final answer
    x = 391,318.79

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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.