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Finding the Fourth Proportional to 489,366.72, 674,611.20 and 345,873.60

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Solution

The fourth proportional to 489,366.72, 674,611.20 and 345,873.60 is: 476,800.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,366.72 : 674,611.20 = 345,873.60 : x
  2. Step 2: Convert to fraction form
    489,366.72/674,611.20 = 345,873.60/x
  3. Step 3: Cross multiply
    489,366.72x = 674,611.20 × 345,873.60
  4. Step 4: Simplify right side
    489,366.72x = 233,330,204,344.32
  5. Step 5: Solve for x
    x = 233,330,204,344.32/489,366.72
  6. Step 6: Final answer
    x = 476,800.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.