Home / 1,221,116.56-1,685,115.75-677,164.57

Finding the Fourth Proportional to 1,221,116.56, 1,685,115.75 and 677,164.57

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Solution

The fourth proportional to 1,221,116.56, 1,685,115.75 and 677,164.57 is: 934,473.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,116.56 : 1,685,115.75 = 677,164.57 : x
  2. Step 2: Convert to fraction form
    1,221,116.56/1,685,115.75 = 677,164.57/x
  3. Step 3: Cross multiply
    1,221,116.56x = 1,685,115.75 × 677,164.57
  4. Step 4: Simplify right side
    1,221,116.56x = 1,141,100,682,248.98
  5. Step 5: Solve for x
    x = 1,141,100,682,248.98/1,221,116.56
  6. Step 6: Final answer
    x = 934,473.19

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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.