Home / 2,163.02-2,985.19-1,278.90

Finding the Fourth Proportional to 2,163.02, 2,985.19 and 1,278.90

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Solution

The fourth proportional to 2,163.02, 2,985.19 and 1,278.90 is: 1,765.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.02 : 2,985.19 = 1,278.90 : x
  2. Step 2: Convert to fraction form
    2,163.02/2,985.19 = 1,278.90/x
  3. Step 3: Cross multiply
    2,163.02x = 2,985.19 × 1,278.90
  4. Step 4: Simplify right side
    2,163.02x = 3,817,756.29
  5. Step 5: Solve for x
    x = 3,817,756.29/2,163.02
  6. Step 6: Final answer
    x = 1,765.02

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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.