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Finding the Fourth Proportional to 1,351.76, 2,028.18 and 486.68

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Solution

The fourth proportional to 1,351.76, 2,028.18 and 486.68 is: 730.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.76 : 2,028.18 = 486.68 : x
  2. Step 2: Convert to fraction form
    1,351.76/2,028.18 = 486.68/x
  3. Step 3: Cross multiply
    1,351.76x = 2,028.18 × 486.68
  4. Step 4: Simplify right side
    1,351.76x = 987,074.64
  5. Step 5: Solve for x
    x = 987,074.64/1,351.76
  6. Step 6: Final answer
    x = 730.21

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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.