Home / 1,186.27-1,639.23-1,028.40

Finding the Fourth Proportional to 1,186.27, 1,639.23 and 1,028.40

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Solution

The fourth proportional to 1,186.27, 1,639.23 and 1,028.40 is: 1,421.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.27 : 1,639.23 = 1,028.40 : x
  2. Step 2: Convert to fraction form
    1,186.27/1,639.23 = 1,028.40/x
  3. Step 3: Cross multiply
    1,186.27x = 1,639.23 × 1,028.40
  4. Step 4: Simplify right side
    1,186.27x = 1,685,777.98
  5. Step 5: Solve for x
    x = 1,685,777.98/1,186.27
  6. Step 6: Final answer
    x = 1,421.07

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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.