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Finding the Fourth Proportional to 716,469.12, 988,727.33 and 394,172.30

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Solution

The fourth proportional to 716,469.12, 988,727.33 and 394,172.30 is: 543,957.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,469.12 : 988,727.33 = 394,172.30 : x
  2. Step 2: Convert to fraction form
    716,469.12/988,727.33 = 394,172.30/x
  3. Step 3: Cross multiply
    716,469.12x = 988,727.33 × 394,172.30
  4. Step 4: Simplify right side
    716,469.12x = 389,728,918,824.46
  5. Step 5: Solve for x
    x = 389,728,918,824.46/716,469.12
  6. Step 6: Final answer
    x = 543,957.73

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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.