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Finding the Third Proportional to 790.50 and 1,705.50

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Solution

The third proportional to 790.50 and 1,705.50 is: 3,679.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.50 : 1,705.50 = 1,705.50 : x
  2. Step 2: Convert to fraction form
    790.50/1,705.50 = 1,705.50/x
  3. Step 3: Cross multiply
    790.50x = 1,705.50 × 1,705.50
  4. Step 4: Simplify right side
    790.50x = 2,908,730.25
  5. Step 5: Solve for x
    x = 2,908,730.25/790.50
  6. Step 6: Final answer
    x = 3,679.61

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.