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Finding the Fourth Proportional to 1,669.91, 2,303.79 and 1,080.77

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Solution

The fourth proportional to 1,669.91, 2,303.79 and 1,080.77 is: 1,491.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,669.91 : 2,303.79 = 1,080.77 : x
  2. Step 2: Convert to fraction form
    1,669.91/2,303.79 = 1,080.77/x
  3. Step 3: Cross multiply
    1,669.91x = 2,303.79 × 1,080.77
  4. Step 4: Simplify right side
    1,669.91x = 2,489,867.12
  5. Step 5: Solve for x
    x = 2,489,867.12/1,669.91
  6. Step 6: Final answer
    x = 1,491.02

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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.