Home / 1,288.21-1,766.13-1,264.85

Finding the Fourth Proportional to 1,288.21, 1,766.13 and 1,264.85

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Solution

The fourth proportional to 1,288.21, 1,766.13 and 1,264.85 is: 1,734.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.21 : 1,766.13 = 1,264.85 : x
  2. Step 2: Convert to fraction form
    1,288.21/1,766.13 = 1,264.85/x
  3. Step 3: Cross multiply
    1,288.21x = 1,766.13 × 1,264.85
  4. Step 4: Simplify right side
    1,288.21x = 2,233,883.21
  5. Step 5: Solve for x
    x = 2,233,883.21/1,288.21
  6. Step 6: Final answer
    x = 1,734.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.