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Finding the Fourth Proportional to 489,152.60, 685,280.20 and 489,152.60

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Solution

The fourth proportional to 489,152.60, 685,280.20 and 489,152.60 is: 685,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,152.60 : 685,280.20 = 489,152.60 : x
  2. Step 2: Convert to fraction form
    489,152.60/685,280.20 = 489,152.60/x
  3. Step 3: Cross multiply
    489,152.60x = 685,280.20 × 489,152.60
  4. Step 4: Simplify right side
    489,152.60x = 335,206,591,558.52
  5. Step 5: Solve for x
    x = 335,206,591,558.52/489,152.60
  6. Step 6: Final answer
    x = 685,280.20

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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.