Home / 1,419.63-1,959.60-1,219.65

Finding the Fourth Proportional to 1,419.63, 1,959.60 and 1,219.65

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Solution

The fourth proportional to 1,419.63, 1,959.60 and 1,219.65 is: 1,683.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.63 : 1,959.60 = 1,219.65 : x
  2. Step 2: Convert to fraction form
    1,419.63/1,959.60 = 1,219.65/x
  3. Step 3: Cross multiply
    1,419.63x = 1,959.60 × 1,219.65
  4. Step 4: Simplify right side
    1,419.63x = 2,390,026.14
  5. Step 5: Solve for x
    x = 2,390,026.14/1,419.63
  6. Step 6: Final answer
    x = 1,683.56

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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.