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Finding the Fourth Proportional to 1,208,786.05, 1,811,352.23 and 808,710.64

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Solution

The fourth proportional to 1,208,786.05, 1,811,352.23 and 808,710.64 is: 1,211,843.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,786.05 : 1,811,352.23 = 808,710.64 : x
  2. Step 2: Convert to fraction form
    1,208,786.05/1,811,352.23 = 808,710.64/x
  3. Step 3: Cross multiply
    1,208,786.05x = 1,811,352.23 × 808,710.64
  4. Step 4: Simplify right side
    1,208,786.05x = 1,464,859,821,188.73
  5. Step 5: Solve for x
    x = 1,464,859,821,188.73/1,208,786.05
  6. Step 6: Final answer
    x = 1,211,843.75

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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.