Home / 2,163.10-2,985.12-1,278.91

Finding the Fourth Proportional to 2,163.10, 2,985.12 and 1,278.91

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Solution

The fourth proportional to 2,163.10, 2,985.12 and 1,278.91 is: 1,764.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.10 : 2,985.12 = 1,278.91 : x
  2. Step 2: Convert to fraction form
    2,163.10/2,985.12 = 1,278.91/x
  3. Step 3: Cross multiply
    2,163.10x = 2,985.12 × 1,278.91
  4. Step 4: Simplify right side
    2,163.10x = 3,817,684.89
  5. Step 5: Solve for x
    x = 3,817,684.89/2,163.10
  6. Step 6: Final answer
    x = 1,764.91

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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.