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Finding the Fourth Proportional to 1,866.38, 2,799.56 and 1,455.81

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Solution

The fourth proportional to 1,866.38, 2,799.56 and 1,455.81 is: 2,183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.38 : 2,799.56 = 1,455.81 : x
  2. Step 2: Convert to fraction form
    1,866.38/2,799.56 = 1,455.81/x
  3. Step 3: Cross multiply
    1,866.38x = 2,799.56 × 1,455.81
  4. Step 4: Simplify right side
    1,866.38x = 4,075,620.16
  5. Step 5: Solve for x
    x = 4,075,620.16/1,866.38
  6. Step 6: Final answer
    x = 2,183.71

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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.