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Finding the Fourth Proportional to 285,444,015.80, 398,760,687.64 and 285,444,015.80

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Solution

The fourth proportional to 285,444,015.80, 398,760,687.64 and 285,444,015.80 is: 398,760,687.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,444,015.80 : 398,760,687.64 = 285,444,015.80 : x
  2. Step 2: Convert to fraction form
    285,444,015.80/398,760,687.64 = 285,444,015.80/x
  3. Step 3: Cross multiply
    285,444,015.80x = 398,760,687.64 × 285,444,015.80
  4. Step 4: Simplify right side
    285,444,015.80x = 113,823,852,023,131,024
  5. Step 5: Solve for x
    x = 113,823,852,023,131,024/285,444,015.80
  6. Step 6: Final answer
    x = 398,760,687.64

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.