Home / 2,138.16-2,948.76-1,440.48

Finding the Fourth Proportional to 2,138.16, 2,948.76 and 1,440.48

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Solution

The fourth proportional to 2,138.16, 2,948.76 and 1,440.48 is: 1,986.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.16 : 2,948.76 = 1,440.48 : x
  2. Step 2: Convert to fraction form
    2,138.16/2,948.76 = 1,440.48/x
  3. Step 3: Cross multiply
    2,138.16x = 2,948.76 × 1,440.48
  4. Step 4: Simplify right side
    2,138.16x = 4,247,629.80
  5. Step 5: Solve for x
    x = 4,247,629.80/2,138.16
  6. Step 6: Final answer
    x = 1,986.58

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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.