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Finding the Fourth Proportional to 355,003.56, 489,968.19 and 209,803.37

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Solution

The fourth proportional to 355,003.56, 489,968.19 and 209,803.37 is: 289,566.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,003.56 : 489,968.19 = 209,803.37 : x
  2. Step 2: Convert to fraction form
    355,003.56/489,968.19 = 209,803.37/x
  3. Step 3: Cross multiply
    355,003.56x = 489,968.19 × 209,803.37
  4. Step 4: Simplify right side
    355,003.56x = 102,796,975,004.96
  5. Step 5: Solve for x
    x = 102,796,975,004.96/355,003.56
  6. Step 6: Final answer
    x = 289,566.04

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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.