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Finding the Fourth Proportional to 1,208,709.09, 1,667,983.73 and 664,844.85

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Solution

The fourth proportional to 1,208,709.09, 1,667,983.73 and 664,844.85 is: 917,466.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,709.09 : 1,667,983.73 = 664,844.85 : x
  2. Step 2: Convert to fraction form
    1,208,709.09/1,667,983.73 = 664,844.85/x
  3. Step 3: Cross multiply
    1,208,709.09x = 1,667,983.73 × 664,844.85
  4. Step 4: Simplify right side
    1,208,709.09x = 1,108,950,389,450.07
  5. Step 5: Solve for x
    x = 1,108,950,389,450.07/1,208,709.09
  6. Step 6: Final answer
    x = 917,466.74

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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.