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Finding the Third Proportional to 290,838 and 615,209

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Solution

The third proportional to 290,838 and 615,209 is: 1,301,350.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,838 : 615,209 = 615,209 : x
  2. Step 2: Convert to fraction form
    290,838/615,209 = 615,209/x
  3. Step 3: Cross multiply
    290,838x = 615,209 × 615,209
  4. Step 4: Simplify right side
    290,838x = 378,482,113,681
  5. Step 5: Solve for x
    x = 378,482,113,681/290,838
  6. Step 6: Final answer
    x = 1,301,350.28

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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.