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Finding the Fourth Proportional to 426,361.65, 639,542.43 and 126,846.51

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Solution

The fourth proportional to 426,361.65, 639,542.43 and 126,846.51 is: 190,269.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,361.65 : 639,542.43 = 126,846.51 : x
  2. Step 2: Convert to fraction form
    426,361.65/639,542.43 = 126,846.51/x
  3. Step 3: Cross multiply
    426,361.65x = 639,542.43 × 126,846.51
  4. Step 4: Simplify right side
    426,361.65x = 81,123,725,242.42
  5. Step 5: Solve for x
    x = 81,123,725,242.42/426,361.65
  6. Step 6: Final answer
    x = 190,269.75

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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.