Home / 1,398.12-2,098.46-1,392.89

Finding the Fourth Proportional to 1,398.12, 2,098.46 and 1,392.89

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Solution

The fourth proportional to 1,398.12, 2,098.46 and 1,392.89 is: 2,090.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.12 : 2,098.46 = 1,392.89 : x
  2. Step 2: Convert to fraction form
    1,398.12/2,098.46 = 1,392.89/x
  3. Step 3: Cross multiply
    1,398.12x = 2,098.46 × 1,392.89
  4. Step 4: Simplify right side
    1,398.12x = 2,922,923.95
  5. Step 5: Solve for x
    x = 2,922,923.95/1,398.12
  6. Step 6: Final answer
    x = 2,090.61

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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.