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Finding the Third Proportional to 420,720.75 and 917,590.25

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Solution

The third proportional to 420,720.75 and 917,590.25 is: 2,001,260.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,720.75 : 917,590.25 = 917,590.25 : x
  2. Step 2: Convert to fraction form
    420,720.75/917,590.25 = 917,590.25/x
  3. Step 3: Cross multiply
    420,720.75x = 917,590.25 × 917,590.25
  4. Step 4: Simplify right side
    420,720.75x = 841,971,866,895.06
  5. Step 5: Solve for x
    x = 841,971,866,895.06/420,720.75
  6. Step 6: Final answer
    x = 2,001,260.62

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.