Home / 1,669.20-2,303.79-1,389.06

Finding the Fourth Proportional to 1,669.20, 2,303.79 and 1,389.06

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Solution

The fourth proportional to 1,669.20, 2,303.79 and 1,389.06 is: 1,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,669.20 : 2,303.79 = 1,389.06 : x
  2. Step 2: Convert to fraction form
    1,669.20/2,303.79 = 1,389.06/x
  3. Step 3: Cross multiply
    1,669.20x = 2,303.79 × 1,389.06
  4. Step 4: Simplify right side
    1,669.20x = 3,200,102.54
  5. Step 5: Solve for x
    x = 3,200,102.54/1,669.20
  6. Step 6: Final answer
    x = 1,917.15

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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.