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Finding the Fourth Proportional to 716,467.73, 988,725.41 and 394,170.90

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Solution

The fourth proportional to 716,467.73, 988,725.41 and 394,170.90 is: 543,955.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,467.73 : 988,725.41 = 394,170.90 : x
  2. Step 2: Convert to fraction form
    716,467.73/988,725.41 = 394,170.90/x
  3. Step 3: Cross multiply
    716,467.73x = 988,725.41 × 394,170.90
  4. Step 4: Simplify right side
    716,467.73x = 389,726,784,712.57
  5. Step 5: Solve for x
    x = 389,726,784,712.57/716,467.73
  6. Step 6: Final answer
    x = 543,955.81

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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.