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Finding the Fourth Proportional to 839,804.10, 1,259,700.39 and 208,716.90

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Solution

The fourth proportional to 839,804.10, 1,259,700.39 and 208,716.90 is: 313,073.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,804.10 : 1,259,700.39 = 208,716.90 : x
  2. Step 2: Convert to fraction form
    839,804.10/1,259,700.39 = 208,716.90/x
  3. Step 3: Cross multiply
    839,804.10x = 1,259,700.39 × 208,716.90
  4. Step 4: Simplify right side
    839,804.10x = 262,920,760,329.59
  5. Step 5: Solve for x
    x = 262,920,760,329.59/839,804.10
  6. Step 6: Final answer
    x = 313,073.92

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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.