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Finding the Third Proportional to 290,840 and 615,213

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Solution

The third proportional to 290,840 and 615,213 is: 1,301,358.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,840 : 615,213 = 615,213 : x
  2. Step 2: Convert to fraction form
    290,840/615,213 = 615,213/x
  3. Step 3: Cross multiply
    290,840x = 615,213 × 615,213
  4. Step 4: Simplify right side
    290,840x = 378,487,035,369
  5. Step 5: Solve for x
    x = 378,487,035,369/290,840
  6. Step 6: Final answer
    x = 1,301,358.26

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.