Home / 3,119.76-4,678.44-1,039.36

Finding the Fourth Proportional to 3,119.76, 4,678.44 and 1,039.36

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Solution

The fourth proportional to 3,119.76, 4,678.44 and 1,039.36 is: 1,558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.76 : 4,678.44 = 1,039.36 : x
  2. Step 2: Convert to fraction form
    3,119.76/4,678.44 = 1,039.36/x
  3. Step 3: Cross multiply
    3,119.76x = 4,678.44 × 1,039.36
  4. Step 4: Simplify right side
    3,119.76x = 4,862,583.40
  5. Step 5: Solve for x
    x = 4,862,583.40/3,119.76
  6. Step 6: Final answer
    x = 1,558.64

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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.