Home / 2,163.42-2,985.34-1,218.91

Finding the Fourth Proportional to 2,163.42, 2,985.34 and 1,218.91

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Solution

The fourth proportional to 2,163.42, 2,985.34 and 1,218.91 is: 1,681.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.42 : 2,985.34 = 1,218.91 : x
  2. Step 2: Convert to fraction form
    2,163.42/2,985.34 = 1,218.91/x
  3. Step 3: Cross multiply
    2,163.42x = 2,985.34 × 1,218.91
  4. Step 4: Simplify right side
    2,163.42x = 3,638,860.78
  5. Step 5: Solve for x
    x = 3,638,860.78/2,163.42
  6. Step 6: Final answer
    x = 1,681.99

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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.