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Finding the Third Proportional to 869.63 and 1,862.88

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Solution

The third proportional to 869.63 and 1,862.88 is: 3,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.63 : 1,862.88 = 1,862.88 : x
  2. Step 2: Convert to fraction form
    869.63/1,862.88 = 1,862.88/x
  3. Step 3: Cross multiply
    869.63x = 1,862.88 × 1,862.88
  4. Step 4: Simplify right side
    869.63x = 3,470,303.27
  5. Step 5: Solve for x
    x = 3,470,303.27/869.63
  6. Step 6: Final answer
    x = 3,990.57

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.