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Finding the Fourth Proportional to 716,241.84, 988,414.26 and 393,976.46

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Solution

The fourth proportional to 716,241.84, 988,414.26 and 393,976.46 is: 543,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,241.84 : 988,414.26 = 393,976.46 : x
  2. Step 2: Convert to fraction form
    716,241.84/988,414.26 = 393,976.46/x
  3. Step 3: Cross multiply
    716,241.84x = 988,414.26 × 393,976.46
  4. Step 4: Simplify right side
    716,241.84x = 389,411,951,168.32
  5. Step 5: Solve for x
    x = 389,411,951,168.32/716,241.84
  6. Step 6: Final answer
    x = 543,687.80

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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.