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Finding the Fourth Proportional to 716,456.09, 988,709.36 and 394,159.28

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Solution

The fourth proportional to 716,456.09, 988,709.36 and 394,159.28 is: 543,939.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,456.09 : 988,709.36 = 394,159.28 : x
  2. Step 2: Convert to fraction form
    716,456.09/988,709.36 = 394,159.28/x
  3. Step 3: Cross multiply
    716,456.09x = 988,709.36 × 394,159.28
  4. Step 4: Simplify right side
    716,456.09x = 389,708,965,508.71
  5. Step 5: Solve for x
    x = 389,708,965,508.71/716,456.09
  6. Step 6: Final answer
    x = 543,939.77

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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.