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Finding the Fourth Proportional to 1,780.55, 2,670.63 and 481.92

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Solution

The fourth proportional to 1,780.55, 2,670.63 and 481.92 is: 722.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.55 : 2,670.63 = 481.92 : x
  2. Step 2: Convert to fraction form
    1,780.55/2,670.63 = 481.92/x
  3. Step 3: Cross multiply
    1,780.55x = 2,670.63 × 481.92
  4. Step 4: Simplify right side
    1,780.55x = 1,287,034.57
  5. Step 5: Solve for x
    x = 1,287,034.57/1,780.55
  6. Step 6: Final answer
    x = 722.83

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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.