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Finding the Fourth Proportional to 2,174.61, 3,261.23 and 713.43

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Solution

The fourth proportional to 2,174.61, 3,261.23 and 713.43 is: 1,069.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.61 : 3,261.23 = 713.43 : x
  2. Step 2: Convert to fraction form
    2,174.61/3,261.23 = 713.43/x
  3. Step 3: Cross multiply
    2,174.61x = 3,261.23 × 713.43
  4. Step 4: Simplify right side
    2,174.61x = 2,326,643.01
  5. Step 5: Solve for x
    x = 2,326,643.01/2,174.61
  6. Step 6: Final answer
    x = 1,069.91

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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.