Home / 2,164.02-2,987.28-1,279.85

Finding the Fourth Proportional to 2,164.02, 2,987.28 and 1,279.85

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Solution

The fourth proportional to 2,164.02, 2,987.28 and 1,279.85 is: 1,766.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.02 : 2,987.28 = 1,279.85 : x
  2. Step 2: Convert to fraction form
    2,164.02/2,987.28 = 1,279.85/x
  3. Step 3: Cross multiply
    2,164.02x = 2,987.28 × 1,279.85
  4. Step 4: Simplify right side
    2,164.02x = 3,823,272.18
  5. Step 5: Solve for x
    x = 3,823,272.18/2,164.02
  6. Step 6: Final answer
    x = 1,766.75

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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.