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Finding the Fourth Proportional to 2,889.81, 4,334.75 and 698.55

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Solution

The fourth proportional to 2,889.81, 4,334.75 and 698.55 is: 1,047.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.81 : 4,334.75 = 698.55 : x
  2. Step 2: Convert to fraction form
    2,889.81/4,334.75 = 698.55/x
  3. Step 3: Cross multiply
    2,889.81x = 4,334.75 × 698.55
  4. Step 4: Simplify right side
    2,889.81x = 3,028,036.12
  5. Step 5: Solve for x
    x = 3,028,036.12/2,889.81
  6. Step 6: Final answer
    x = 1,047.83

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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.