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Finding the Fourth Proportional to 489,077.60, 683,879.20 and 489,077.60

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Solution

The fourth proportional to 489,077.60, 683,879.20 and 489,077.60 is: 683,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,077.60 : 683,879.20 = 489,077.60 : x
  2. Step 2: Convert to fraction form
    489,077.60/683,879.20 = 489,077.60/x
  3. Step 3: Cross multiply
    489,077.60x = 683,879.20 × 489,077.60
  4. Step 4: Simplify right side
    489,077.60x = 334,469,997,825.92
  5. Step 5: Solve for x
    x = 334,469,997,825.92/489,077.60
  6. Step 6: Final answer
    x = 683,879.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.