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Finding the Fourth Proportional to 679,712.47, 1,019,568.78 and 323,647

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Solution

The fourth proportional to 679,712.47, 1,019,568.78 and 323,647 is: 485,470.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,712.47 : 1,019,568.78 = 323,647 : x
  2. Step 2: Convert to fraction form
    679,712.47/1,019,568.78 = 323,647/x
  3. Step 3: Cross multiply
    679,712.47x = 1,019,568.78 × 323,647
  4. Step 4: Simplify right side
    679,712.47x = 329,980,376,940.66
  5. Step 5: Solve for x
    x = 329,980,376,940.66/679,712.47
  6. Step 6: Final answer
    x = 485,470.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.