Home / 1,219.58-1,683.83-939.32

Finding the Fourth Proportional to 1,219.58, 1,683.83 and 939.32

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Solution

The fourth proportional to 1,219.58, 1,683.83 and 939.32 is: 1,296.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.58 : 1,683.83 = 939.32 : x
  2. Step 2: Convert to fraction form
    1,219.58/1,683.83 = 939.32/x
  3. Step 3: Cross multiply
    1,219.58x = 1,683.83 × 939.32
  4. Step 4: Simplify right side
    1,219.58x = 1,581,655.20
  5. Step 5: Solve for x
    x = 1,581,655.20/1,219.58
  6. Step 6: Final answer
    x = 1,296.89

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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.