Home / 2,163.16-2,985.91-1,278.91

Finding the Fourth Proportional to 2,163.16, 2,985.91 and 1,278.91

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Solution

The fourth proportional to 2,163.16, 2,985.91 and 1,278.91 is: 1,765.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.16 : 2,985.91 = 1,278.91 : x
  2. Step 2: Convert to fraction form
    2,163.16/2,985.91 = 1,278.91/x
  3. Step 3: Cross multiply
    2,163.16x = 2,985.91 × 1,278.91
  4. Step 4: Simplify right side
    2,163.16x = 3,818,710.16
  5. Step 5: Solve for x
    x = 3,818,710.16/2,163.16
  6. Step 6: Final answer
    x = 1,765.34

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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.