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Finding the Third Proportional to 1,405.79 and 3,006.18

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Solution

The third proportional to 1,405.79 and 3,006.18 is: 6,428.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.79 : 3,006.18 = 3,006.18 : x
  2. Step 2: Convert to fraction form
    1,405.79/3,006.18 = 3,006.18/x
  3. Step 3: Cross multiply
    1,405.79x = 3,006.18 × 3,006.18
  4. Step 4: Simplify right side
    1,405.79x = 9,037,092.83
  5. Step 5: Solve for x
    x = 9,037,092.83/1,405.79
  6. Step 6: Final answer
    x = 6,428.47

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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.