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Finding the Fourth Proportional to 299,866.10, 449,872.90 and 211,292.60

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Solution

The fourth proportional to 299,866.10, 449,872.90 and 211,292.60 is: 316,990.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,866.10 : 449,872.90 = 211,292.60 : x
  2. Step 2: Convert to fraction form
    299,866.10/449,872.90 = 211,292.60/x
  3. Step 3: Cross multiply
    299,866.10x = 449,872.90 × 211,292.60
  4. Step 4: Simplify right side
    299,866.10x = 95,054,814,710.54
  5. Step 5: Solve for x
    x = 95,054,814,710.54/299,866.10
  6. Step 6: Final answer
    x = 316,990.87

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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.