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Finding the Fourth Proportional to 2,572.44, 3,858.81 and 698.61

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Solution

The fourth proportional to 2,572.44, 3,858.81 and 698.61 is: 1,047.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.44 : 3,858.81 = 698.61 : x
  2. Step 2: Convert to fraction form
    2,572.44/3,858.81 = 698.61/x
  3. Step 3: Cross multiply
    2,572.44x = 3,858.81 × 698.61
  4. Step 4: Simplify right side
    2,572.44x = 2,695,803.25
  5. Step 5: Solve for x
    x = 2,695,803.25/2,572.44
  6. Step 6: Final answer
    x = 1,047.96

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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.