Home / 1,398.42-2,087.40-1,335.24

Finding the Fourth Proportional to 1,398.42, 2,087.40 and 1,335.24

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Solution

The fourth proportional to 1,398.42, 2,087.40 and 1,335.24 is: 1,993.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.42 : 2,087.40 = 1,335.24 : x
  2. Step 2: Convert to fraction form
    1,398.42/2,087.40 = 1,335.24/x
  3. Step 3: Cross multiply
    1,398.42x = 2,087.40 × 1,335.24
  4. Step 4: Simplify right side
    1,398.42x = 2,787,179.98
  5. Step 5: Solve for x
    x = 2,787,179.98/1,398.42
  6. Step 6: Final answer
    x = 1,993.09

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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.