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Finding the Third Proportional to 428,318.81 and 913,636.31

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Solution

The third proportional to 428,318.81 and 913,636.31 is: 1,948,855.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,318.81 : 913,636.31 = 913,636.31 : x
  2. Step 2: Convert to fraction form
    428,318.81/913,636.31 = 913,636.31/x
  3. Step 3: Cross multiply
    428,318.81x = 913,636.31 × 913,636.31
  4. Step 4: Simplify right side
    428,318.81x = 834,731,311,518.60
  5. Step 5: Solve for x
    x = 834,731,311,518.60/428,318.81
  6. Step 6: Final answer
    x = 1,948,855.12

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.