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Finding the Fourth Proportional to 2,825.81, 3,899.63 and 1,583.81

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Solution

The fourth proportional to 2,825.81, 3,899.63 and 1,583.81 is: 2,185.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.81 : 3,899.63 = 1,583.81 : x
  2. Step 2: Convert to fraction form
    2,825.81/3,899.63 = 1,583.81/x
  3. Step 3: Cross multiply
    2,825.81x = 3,899.63 × 1,583.81
  4. Step 4: Simplify right side
    2,825.81x = 6,176,280.76
  5. Step 5: Solve for x
    x = 6,176,280.76/2,825.81
  6. Step 6: Final answer
    x = 2,185.67

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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.