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Finding the Fourth Proportional to 1,790.76, 2,686.07 and 492.19

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Solution

The fourth proportional to 1,790.76, 2,686.07 and 492.19 is: 738.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.76 : 2,686.07 = 492.19 : x
  2. Step 2: Convert to fraction form
    1,790.76/2,686.07 = 492.19/x
  3. Step 3: Cross multiply
    1,790.76x = 2,686.07 × 492.19
  4. Step 4: Simplify right side
    1,790.76x = 1,322,054.33
  5. Step 5: Solve for x
    x = 1,322,054.33/1,790.76
  6. Step 6: Final answer
    x = 738.27

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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.