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Finding the Fourth Proportional to 1,790.76, 2,686.48 and 866.94

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Solution

The fourth proportional to 1,790.76, 2,686.48 and 866.94 is: 1,300.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.76 : 2,686.48 = 866.94 : x
  2. Step 2: Convert to fraction form
    1,790.76/2,686.48 = 866.94/x
  3. Step 3: Cross multiply
    1,790.76x = 2,686.48 × 866.94
  4. Step 4: Simplify right side
    1,790.76x = 2,329,016.97
  5. Step 5: Solve for x
    x = 2,329,016.97/1,790.76
  6. Step 6: Final answer
    x = 1,300.57

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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.