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Finding the Fourth Proportional to 716,295.89, 988,467.50 and 394,005.92

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Solution

The fourth proportional to 716,295.89, 988,467.50 and 394,005.92 is: 543,716.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,295.89 : 988,467.50 = 394,005.92 : x
  2. Step 2: Convert to fraction form
    716,295.89/988,467.50 = 394,005.92/x
  3. Step 3: Cross multiply
    716,295.89x = 988,467.50 × 394,005.92
  4. Step 4: Simplify right side
    716,295.89x = 389,462,042,770.28
  5. Step 5: Solve for x
    x = 389,462,042,770.28/716,295.89
  6. Step 6: Final answer
    x = 543,716.71

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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.