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Finding the Fourth Proportional to 5,648.80, 7,794.80 and 3,131.06

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Solution

The fourth proportional to 5,648.80, 7,794.80 and 3,131.06 is: 4,320.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,648.80 : 7,794.80 = 3,131.06 : x
  2. Step 2: Convert to fraction form
    5,648.80/7,794.80 = 3,131.06/x
  3. Step 3: Cross multiply
    5,648.80x = 7,794.80 × 3,131.06
  4. Step 4: Simplify right side
    5,648.80x = 24,405,986.49
  5. Step 5: Solve for x
    x = 24,405,986.49/5,648.80
  6. Step 6: Final answer
    x = 4,320.56

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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.