Home / 2,163.14-2,985.10-1,218.98

Finding the Fourth Proportional to 2,163.14, 2,985.10 and 1,218.98

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Solution

The fourth proportional to 2,163.14, 2,985.10 and 1,218.98 is: 1,682.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.14 : 2,985.10 = 1,218.98 : x
  2. Step 2: Convert to fraction form
    2,163.14/2,985.10 = 1,218.98/x
  3. Step 3: Cross multiply
    2,163.14x = 2,985.10 × 1,218.98
  4. Step 4: Simplify right side
    2,163.14x = 3,638,763.80
  5. Step 5: Solve for x
    x = 3,638,763.80/2,163.14
  6. Step 6: Final answer
    x = 1,682.17

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1.5x scale

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.