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Finding the Fourth Proportional to 300,122.79, 449,684.42 and 211,189.46

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Solution

The fourth proportional to 300,122.79, 449,684.42 and 211,189.46 is: 316,432.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,122.79 : 449,684.42 = 211,189.46 : x
  2. Step 2: Convert to fraction form
    300,122.79/449,684.42 = 211,189.46/x
  3. Step 3: Cross multiply
    300,122.79x = 449,684.42 × 211,189.46
  4. Step 4: Simplify right side
    300,122.79x = 94,968,606,525.84
  5. Step 5: Solve for x
    x = 94,968,606,525.84/300,122.79
  6. Step 6: Final answer
    x = 316,432.51

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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.