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Finding the Third Proportional to 420,308.88 and 912,062.75

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Solution

The third proportional to 420,308.88 and 912,062.75 is: 1,979,159.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,308.88 : 912,062.75 = 912,062.75 : x
  2. Step 2: Convert to fraction form
    420,308.88/912,062.75 = 912,062.75/x
  3. Step 3: Cross multiply
    420,308.88x = 912,062.75 × 912,062.75
  4. Step 4: Simplify right side
    420,308.88x = 831,858,459,937.56
  5. Step 5: Solve for x
    x = 831,858,459,937.56/420,308.88
  6. Step 6: Final answer
    x = 1,979,159.87

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.