Home / 3,419.70-5,129.81-1,228.45

Finding the Fourth Proportional to 3,419.70, 5,129.81 and 1,228.45

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Solution

The fourth proportional to 3,419.70, 5,129.81 and 1,228.45 is: 1,842.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.70 : 5,129.81 = 1,228.45 : x
  2. Step 2: Convert to fraction form
    3,419.70/5,129.81 = 1,228.45/x
  3. Step 3: Cross multiply
    3,419.70x = 5,129.81 × 1,228.45
  4. Step 4: Simplify right side
    3,419.70x = 6,301,715.09
  5. Step 5: Solve for x
    x = 6,301,715.09/3,419.70
  6. Step 6: Final answer
    x = 1,842.77

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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.