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Finding the Third Proportional to 311,940 and 470,718

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Solution

The third proportional to 311,940 and 470,718 is: 710,314.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,940 : 470,718 = 470,718 : x
  2. Step 2: Convert to fraction form
    311,940/470,718 = 470,718/x
  3. Step 3: Cross multiply
    311,940x = 470,718 × 470,718
  4. Step 4: Simplify right side
    311,940x = 221,575,435,524
  5. Step 5: Solve for x
    x = 221,575,435,524/311,940
  6. Step 6: Final answer
    x = 710,314.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.