Home / 640,849.60-961,015.20-219,908.80

Finding the Fourth Proportional to 640,849.60, 961,015.20 and 219,908.80

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Solution

The fourth proportional to 640,849.60, 961,015.20 and 219,908.80 is: 329,774.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,849.60 : 961,015.20 = 219,908.80 : x
  2. Step 2: Convert to fraction form
    640,849.60/961,015.20 = 219,908.80/x
  3. Step 3: Cross multiply
    640,849.60x = 961,015.20 × 219,908.80
  4. Step 4: Simplify right side
    640,849.60x = 211,335,699,413.76
  5. Step 5: Solve for x
    x = 211,335,699,413.76/640,849.60
  6. Step 6: Final answer
    x = 329,774.26

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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.