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Finding the Fourth Proportional to 1,780.36, 2,670.68 and 481.81

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Solution

The fourth proportional to 1,780.36, 2,670.68 and 481.81 is: 722.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.36 : 2,670.68 = 481.81 : x
  2. Step 2: Convert to fraction form
    1,780.36/2,670.68 = 481.81/x
  3. Step 3: Cross multiply
    1,780.36x = 2,670.68 × 481.81
  4. Step 4: Simplify right side
    1,780.36x = 1,286,760.33
  5. Step 5: Solve for x
    x = 1,286,760.33/1,780.36
  6. Step 6: Final answer
    x = 722.75

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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.