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Finding the Fourth Proportional to 1,780.23, 2,670.48 and 481.68

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Solution

The fourth proportional to 1,780.23, 2,670.48 and 481.68 is: 722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.23 : 2,670.48 = 481.68 : x
  2. Step 2: Convert to fraction form
    1,780.23/2,670.48 = 481.68/x
  3. Step 3: Cross multiply
    1,780.23x = 2,670.48 × 481.68
  4. Step 4: Simplify right side
    1,780.23x = 1,286,316.81
  5. Step 5: Solve for x
    x = 1,286,316.81/1,780.23
  6. Step 6: Final answer
    x = 722.56

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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.