Home / 2,163.90-2,985.56-1,219.35

Finding the Fourth Proportional to 2,163.90, 2,985.56 and 1,219.35

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Solution

The fourth proportional to 2,163.90, 2,985.56 and 1,219.35 is: 1,682.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.90 : 2,985.56 = 1,219.35 : x
  2. Step 2: Convert to fraction form
    2,163.90/2,985.56 = 1,219.35/x
  3. Step 3: Cross multiply
    2,163.90x = 2,985.56 × 1,219.35
  4. Step 4: Simplify right side
    2,163.90x = 3,640,436.49
  5. Step 5: Solve for x
    x = 3,640,436.49/2,163.90
  6. Step 6: Final answer
    x = 1,682.35

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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.