Home / 1,424.36-2,138.16-1,330.40

Finding the Fourth Proportional to 1,424.36, 2,138.16 and 1,330.40

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Solution

The fourth proportional to 1,424.36, 2,138.16 and 1,330.40 is: 1,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.36 : 2,138.16 = 1,330.40 : x
  2. Step 2: Convert to fraction form
    1,424.36/2,138.16 = 1,330.40/x
  3. Step 3: Cross multiply
    1,424.36x = 2,138.16 × 1,330.40
  4. Step 4: Simplify right side
    1,424.36x = 2,844,608.06
  5. Step 5: Solve for x
    x = 2,844,608.06/1,424.36
  6. Step 6: Final answer
    x = 1,997.11

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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.