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Finding the Fourth Proportional to 1,183.76, 1,775.88 and 453.20

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Solution

The fourth proportional to 1,183.76, 1,775.88 and 453.20 is: 679.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.76 : 1,775.88 = 453.20 : x
  2. Step 2: Convert to fraction form
    1,183.76/1,775.88 = 453.20/x
  3. Step 3: Cross multiply
    1,183.76x = 1,775.88 × 453.20
  4. Step 4: Simplify right side
    1,183.76x = 804,828.82
  5. Step 5: Solve for x
    x = 804,828.82/1,183.76
  6. Step 6: Final answer
    x = 679.89

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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.