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Finding the Fourth Proportional to 641,281.08, 884,993.94 and 354,796.50

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Solution

The fourth proportional to 641,281.08, 884,993.94 and 354,796.50 is: 489,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,281.08 : 884,993.94 = 354,796.50 : x
  2. Step 2: Convert to fraction form
    641,281.08/884,993.94 = 354,796.50/x
  3. Step 3: Cross multiply
    641,281.08x = 884,993.94 × 354,796.50
  4. Step 4: Simplify right side
    641,281.08x = 313,992,752,433.21
  5. Step 5: Solve for x
    x = 313,992,752,433.21/641,281.08
  6. Step 6: Final answer
    x = 489,633.58

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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.