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Finding the Fourth Proportional to 2,786.90, 4,180.35 and 2,642.90

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Solution

The fourth proportional to 2,786.90, 4,180.35 and 2,642.90 is: 3,964.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.90 : 4,180.35 = 2,642.90 : x
  2. Step 2: Convert to fraction form
    2,786.90/4,180.35 = 2,642.90/x
  3. Step 3: Cross multiply
    2,786.90x = 4,180.35 × 2,642.90
  4. Step 4: Simplify right side
    2,786.90x = 11,048,247.02
  5. Step 5: Solve for x
    x = 11,048,247.02/2,786.90
  6. Step 6: Final answer
    x = 3,964.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.