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Finding the Fourth Proportional to 1,790.51, 2,686.57 and 866.90

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Solution

The fourth proportional to 1,790.51, 2,686.57 and 866.90 is: 1,300.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.51 : 2,686.57 = 866.90 : x
  2. Step 2: Convert to fraction form
    1,790.51/2,686.57 = 866.90/x
  3. Step 3: Cross multiply
    1,790.51x = 2,686.57 × 866.90
  4. Step 4: Simplify right side
    1,790.51x = 2,328,992.08
  5. Step 5: Solve for x
    x = 2,328,992.08/1,790.51
  6. Step 6: Final answer
    x = 1,300.75

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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.