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Finding the Fourth Proportional to 2,963.40, 4,090.80 and 1,768.80

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Solution

The fourth proportional to 2,963.40, 4,090.80 and 1,768.80 is: 2,441.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,963.40 : 4,090.80 = 1,768.80 : x
  2. Step 2: Convert to fraction form
    2,963.40/4,090.80 = 1,768.80/x
  3. Step 3: Cross multiply
    2,963.40x = 4,090.80 × 1,768.80
  4. Step 4: Simplify right side
    2,963.40x = 7,235,829.01
  5. Step 5: Solve for x
    x = 7,235,829.01/2,963.40
  6. Step 6: Final answer
    x = 2,441.73

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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.