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Finding the Third Proportional to 428,841.75 and 628,939.13

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Solution

The third proportional to 428,841.75 and 628,939.13 is: 922,401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,841.75 : 628,939.13 = 628,939.13 : x
  2. Step 2: Convert to fraction form
    428,841.75/628,939.13 = 628,939.13/x
  3. Step 3: Cross multiply
    428,841.75x = 628,939.13 × 628,939.13
  4. Step 4: Simplify right side
    428,841.75x = 395,564,422,955.77
  5. Step 5: Solve for x
    x = 395,564,422,955.77/428,841.75
  6. Step 6: Final answer
    x = 922,401.85

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.