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Finding the Third Proportional to 317,397 and 430,578

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Solution

The third proportional to 317,397 and 430,578 is: 584,118.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,397 : 430,578 = 430,578 : x
  2. Step 2: Convert to fraction form
    317,397/430,578 = 430,578/x
  3. Step 3: Cross multiply
    317,397x = 430,578 × 430,578
  4. Step 4: Simplify right side
    317,397x = 185,397,414,084
  5. Step 5: Solve for x
    x = 185,397,414,084/317,397
  6. Step 6: Final answer
    x = 584,118.36

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.