Home / 2,014.90-2,780.38-1,228.80

Finding the Fourth Proportional to 2,014.90, 2,780.38 and 1,228.80

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Solution

The fourth proportional to 2,014.90, 2,780.38 and 1,228.80 is: 1,695.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,014.90 : 2,780.38 = 1,228.80 : x
  2. Step 2: Convert to fraction form
    2,014.90/2,780.38 = 1,228.80/x
  3. Step 3: Cross multiply
    2,014.90x = 2,780.38 × 1,228.80
  4. Step 4: Simplify right side
    2,014.90x = 3,416,530.94
  5. Step 5: Solve for x
    x = 3,416,530.94/2,014.90
  6. Step 6: Final answer
    x = 1,695.63

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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.