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Finding the Fourth Proportional to 1,790.99, 2,686.12 and 492.16

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Solution

The fourth proportional to 1,790.99, 2,686.12 and 492.16 is: 738.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.99 : 2,686.12 = 492.16 : x
  2. Step 2: Convert to fraction form
    1,790.99/2,686.12 = 492.16/x
  3. Step 3: Cross multiply
    1,790.99x = 2,686.12 × 492.16
  4. Step 4: Simplify right side
    1,790.99x = 1,321,992.87
  5. Step 5: Solve for x
    x = 1,321,992.87/1,790.99
  6. Step 6: Final answer
    x = 738.13

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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.