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Finding the Fourth Proportional to 3,586.56, 5,378.80 and 1,394.80

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Solution

The fourth proportional to 3,586.56, 5,378.80 and 1,394.80 is: 2,091.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.56 : 5,378.80 = 1,394.80 : x
  2. Step 2: Convert to fraction form
    3,586.56/5,378.80 = 1,394.80/x
  3. Step 3: Cross multiply
    3,586.56x = 5,378.80 × 1,394.80
  4. Step 4: Simplify right side
    3,586.56x = 7,502,350.24
  5. Step 5: Solve for x
    x = 7,502,350.24/3,586.56
  6. Step 6: Final answer
    x = 2,091.80

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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.