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Finding the Fourth Proportional to 2,961, 4,086.18 and 1,782.12

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Solution

The fourth proportional to 2,961, 4,086.18 and 1,782.12 is: 2,459.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961 : 4,086.18 = 1,782.12 : x
  2. Step 2: Convert to fraction form
    2,961/4,086.18 = 1,782.12/x
  3. Step 3: Cross multiply
    2,961x = 4,086.18 × 1,782.12
  4. Step 4: Simplify right side
    2,961x = 7,282,063.10
  5. Step 5: Solve for x
    x = 7,282,063.10/2,961
  6. Step 6: Final answer
    x = 2,459.33

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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.