Home / 1,644.02-2,268.78-1,290.37

Finding the Fourth Proportional to 1,644.02, 2,268.78 and 1,290.37

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Solution

The fourth proportional to 1,644.02, 2,268.78 and 1,290.37 is: 1,780.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.02 : 2,268.78 = 1,290.37 : x
  2. Step 2: Convert to fraction form
    1,644.02/2,268.78 = 1,290.37/x
  3. Step 3: Cross multiply
    1,644.02x = 2,268.78 × 1,290.37
  4. Step 4: Simplify right side
    1,644.02x = 2,927,565.65
  5. Step 5: Solve for x
    x = 2,927,565.65/1,644.02
  6. Step 6: Final answer
    x = 1,780.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.