Home / 1,529.12-2,111.40-998.37

Finding the Fourth Proportional to 1,529.12, 2,111.40 and 998.37

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Solution

The fourth proportional to 1,529.12, 2,111.40 and 998.37 is: 1,378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.12 : 2,111.40 = 998.37 : x
  2. Step 2: Convert to fraction form
    1,529.12/2,111.40 = 998.37/x
  3. Step 3: Cross multiply
    1,529.12x = 2,111.40 × 998.37
  4. Step 4: Simplify right side
    1,529.12x = 2,107,958.42
  5. Step 5: Solve for x
    x = 2,107,958.42/1,529.12
  6. Step 6: Final answer
    x = 1,378.54

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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.