Home / 858,431,361.40-1,287,647,042.10-212,199,105.40

Finding the Fourth Proportional to 858,431,361.40, 1,287,647,042.10 and 212,199,105.40

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Solution

The fourth proportional to 858,431,361.40, 1,287,647,042.10 and 212,199,105.40 is: 318,298,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,361.40 : 1,287,647,042.10 = 212,199,105.40 : x
  2. Step 2: Convert to fraction form
    858,431,361.40/1,287,647,042.10 = 212,199,105.40/x
  3. Step 3: Cross multiply
    858,431,361.40x = 1,287,647,042.10 × 212,199,105.40
  4. Step 4: Simplify right side
    858,431,361.40x = 273,237,550,404,576,128
  5. Step 5: Solve for x
    x = 273,237,550,404,576,128/858,431,361.40
  6. Step 6: Final answer
    x = 318,298,658.10

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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.