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Finding the Fourth Proportional to 839,805.10, 1,259,701.89 and 208,717.90

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Solution

The fourth proportional to 839,805.10, 1,259,701.89 and 208,717.90 is: 313,075.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,805.10 : 1,259,701.89 = 208,717.90 : x
  2. Step 2: Convert to fraction form
    839,805.10/1,259,701.89 = 208,717.90/x
  3. Step 3: Cross multiply
    839,805.10x = 1,259,701.89 × 208,717.90
  4. Step 4: Simplify right side
    839,805.10x = 262,922,333,106.83
  5. Step 5: Solve for x
    x = 262,922,333,106.83/839,805.10
  6. Step 6: Final answer
    x = 313,075.42

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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.