Home / 2,163.32-2,985.07-1,218.95

Finding the Fourth Proportional to 2,163.32, 2,985.07 and 1,218.95

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Solution

The fourth proportional to 2,163.32, 2,985.07 and 1,218.95 is: 1,681.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.32 : 2,985.07 = 1,218.95 : x
  2. Step 2: Convert to fraction form
    2,163.32/2,985.07 = 1,218.95/x
  3. Step 3: Cross multiply
    2,163.32x = 2,985.07 × 1,218.95
  4. Step 4: Simplify right side
    2,163.32x = 3,638,651.08
  5. Step 5: Solve for x
    x = 3,638,651.08/2,163.32
  6. Step 6: Final answer
    x = 1,681.98

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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.