Home / 858,431,337.90-1,287,647,006.85-212,199,081.90

Finding the Fourth Proportional to 858,431,337.90, 1,287,647,006.85 and 212,199,081.90

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Solution

The fourth proportional to 858,431,337.90, 1,287,647,006.85 and 212,199,081.90 is: 318,298,622.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,337.90 : 1,287,647,006.85 = 212,199,081.90 : x
  2. Step 2: Convert to fraction form
    858,431,337.90/1,287,647,006.85 = 212,199,081.90/x
  3. Step 3: Cross multiply
    858,431,337.90x = 1,287,647,006.85 × 212,199,081.90
  4. Step 4: Simplify right side
    858,431,337.90x = 273,237,512,664,852,992
  5. Step 5: Solve for x
    x = 273,237,512,664,852,992/858,431,337.90
  6. Step 6: Final answer
    x = 318,298,622.85

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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.