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Finding the Fourth Proportional to 640,246.80, 960,418.80 and 190,932.60

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Solution

The fourth proportional to 640,246.80, 960,418.80 and 190,932.60 is: 286,413.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,246.80 : 960,418.80 = 190,932.60 : x
  2. Step 2: Convert to fraction form
    640,246.80/960,418.80 = 190,932.60/x
  3. Step 3: Cross multiply
    640,246.80x = 960,418.80 × 190,932.60
  4. Step 4: Simplify right side
    640,246.80x = 183,375,258,572.88
  5. Step 5: Solve for x
    x = 183,375,258,572.88/640,246.80
  6. Step 6: Final answer
    x = 286,413.39

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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.