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Finding the Fourth Proportional to 666,361.36, 997,940.40 and 381,187.36

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Solution

The fourth proportional to 666,361.36, 997,940.40 and 381,187.36 is: 570,864.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,361.36 : 997,940.40 = 381,187.36 : x
  2. Step 2: Convert to fraction form
    666,361.36/997,940.40 = 381,187.36/x
  3. Step 3: Cross multiply
    666,361.36x = 997,940.40 × 381,187.36
  4. Step 4: Simplify right side
    666,361.36x = 380,402,266,513.34
  5. Step 5: Solve for x
    x = 380,402,266,513.34/666,361.36
  6. Step 6: Final answer
    x = 570,864.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.