Home / 1,215,231.75-1,677,019.86-678,687.75

Finding the Fourth Proportional to 1,215,231.75, 1,677,019.86 and 678,687.75

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Solution

The fourth proportional to 1,215,231.75, 1,677,019.86 and 678,687.75 is: 936,589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,231.75 : 1,677,019.86 = 678,687.75 : x
  2. Step 2: Convert to fraction form
    1,215,231.75/1,677,019.86 = 678,687.75/x
  3. Step 3: Cross multiply
    1,215,231.75x = 1,677,019.86 × 678,687.75
  4. Step 4: Simplify right side
    1,215,231.75x = 1,138,172,835,488.72
  5. Step 5: Solve for x
    x = 1,138,172,835,488.72/1,215,231.75
  6. Step 6: Final answer
    x = 936,589.12

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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.