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Finding the Fourth Proportional to 716,456.84, 988,710.40 and 394,160.03

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Solution

The fourth proportional to 716,456.84, 988,710.40 and 394,160.03 is: 543,940.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,456.84 : 988,710.40 = 394,160.03 : x
  2. Step 2: Convert to fraction form
    716,456.84/988,710.40 = 394,160.03/x
  3. Step 3: Cross multiply
    716,456.84x = 988,710.40 × 394,160.03
  4. Step 4: Simplify right side
    716,456.84x = 389,710,114,996.36
  5. Step 5: Solve for x
    x = 389,710,114,996.36/716,456.84
  6. Step 6: Final answer
    x = 543,940.81

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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.