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Finding the Third Proportional to 270,453.75 and 428,256.75

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Solution

The third proportional to 270,453.75 and 428,256.75 is: 678,133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,453.75 : 428,256.75 = 428,256.75 : x
  2. Step 2: Convert to fraction form
    270,453.75/428,256.75 = 428,256.75/x
  3. Step 3: Cross multiply
    270,453.75x = 428,256.75 × 428,256.75
  4. Step 4: Simplify right side
    270,453.75x = 183,403,843,920.56
  5. Step 5: Solve for x
    x = 183,403,843,920.56/270,453.75
  6. Step 6: Final answer
    x = 678,133.85

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.