Home / 1,396.98-2,083.29-1,239.64

Finding the Fourth Proportional to 1,396.98, 2,083.29 and 1,239.64

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Solution

The fourth proportional to 1,396.98, 2,083.29 and 1,239.64 is: 1,848.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.98 : 2,083.29 = 1,239.64 : x
  2. Step 2: Convert to fraction form
    1,396.98/2,083.29 = 1,239.64/x
  3. Step 3: Cross multiply
    1,396.98x = 2,083.29 × 1,239.64
  4. Step 4: Simplify right side
    1,396.98x = 2,582,519.76
  5. Step 5: Solve for x
    x = 2,582,519.76/1,396.98
  6. Step 6: Final answer
    x = 1,848.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.