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Finding the Fourth Proportional to 666,189.70, 998,792.07 and 345,881.68

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Solution

The fourth proportional to 666,189.70, 998,792.07 and 345,881.68 is: 518,566.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,189.70 : 998,792.07 = 345,881.68 : x
  2. Step 2: Convert to fraction form
    666,189.70/998,792.07 = 345,881.68/x
  3. Step 3: Cross multiply
    666,189.70x = 998,792.07 × 345,881.68
  4. Step 4: Simplify right side
    666,189.70x = 345,463,879,142.28
  5. Step 5: Solve for x
    x = 345,463,879,142.28/666,189.70
  6. Step 6: Final answer
    x = 518,566.83

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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.