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Finding the Fourth Proportional to 489,771.20, 734,656.80 and 411,039.20

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Solution

The fourth proportional to 489,771.20, 734,656.80 and 411,039.20 is: 616,558.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,771.20 : 734,656.80 = 411,039.20 : x
  2. Step 2: Convert to fraction form
    489,771.20/734,656.80 = 411,039.20/x
  3. Step 3: Cross multiply
    489,771.20x = 734,656.80 × 411,039.20
  4. Step 4: Simplify right side
    489,771.20x = 301,972,743,346.56
  5. Step 5: Solve for x
    x = 301,972,743,346.56/489,771.20
  6. Step 6: Final answer
    x = 616,558.80

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Similar ratio
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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.