Home / 1,222,279.87-1,686,609.42-678,438.58

Finding the Fourth Proportional to 1,222,279.87, 1,686,609.42 and 678,438.58

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Solution

The fourth proportional to 1,222,279.87, 1,686,609.42 and 678,438.58 is: 936,169.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,279.87 : 1,686,609.42 = 678,438.58 : x
  2. Step 2: Convert to fraction form
    1,222,279.87/1,686,609.42 = 678,438.58/x
  3. Step 3: Cross multiply
    1,222,279.87x = 1,686,609.42 × 678,438.58
  4. Step 4: Simplify right side
    1,222,279.87x = 1,144,260,899,919.42
  5. Step 5: Solve for x
    x = 1,144,260,899,919.42/1,222,279.87
  6. Step 6: Final answer
    x = 936,169.31

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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.