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Finding the Fourth Proportional to 2,753.21, 4,130 and 805.25

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Solution

The fourth proportional to 2,753.21, 4,130 and 805.25 is: 1,207.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.21 : 4,130 = 805.25 : x
  2. Step 2: Convert to fraction form
    2,753.21/4,130 = 805.25/x
  3. Step 3: Cross multiply
    2,753.21x = 4,130 × 805.25
  4. Step 4: Simplify right side
    2,753.21x = 3,325,682.50
  5. Step 5: Solve for x
    x = 3,325,682.50/2,753.21
  6. Step 6: Final answer
    x = 1,207.93

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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.