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Finding the Third Proportional to 261,825 and 409,585.50

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Solution

The third proportional to 261,825 and 409,585.50 is: 640,734.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,825 : 409,585.50 = 409,585.50 : x
  2. Step 2: Convert to fraction form
    261,825/409,585.50 = 409,585.50/x
  3. Step 3: Cross multiply
    261,825x = 409,585.50 × 409,585.50
  4. Step 4: Simplify right side
    261,825x = 167,760,281,810.25
  5. Step 5: Solve for x
    x = 167,760,281,810.25/261,825
  6. Step 6: Final answer
    x = 640,734.39

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.