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Finding the Third Proportional to 153,419 and 317,489

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Solution

The third proportional to 153,419 and 317,489 is: 657,019.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,419 : 317,489 = 317,489 : x
  2. Step 2: Convert to fraction form
    153,419/317,489 = 317,489/x
  3. Step 3: Cross multiply
    153,419x = 317,489 × 317,489
  4. Step 4: Simplify right side
    153,419x = 100,799,265,121
  5. Step 5: Solve for x
    x = 100,799,265,121/153,419
  6. Step 6: Final answer
    x = 657,019.44

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.