Home / 858,431,355.40-1,287,647,033.10-212,199,099.40

Finding the Fourth Proportional to 858,431,355.40, 1,287,647,033.10 and 212,199,099.40

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Solution

The fourth proportional to 858,431,355.40, 1,287,647,033.10 and 212,199,099.40 is: 318,298,649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,355.40 : 1,287,647,033.10 = 212,199,099.40 : x
  2. Step 2: Convert to fraction form
    858,431,355.40/1,287,647,033.10 = 212,199,099.40/x
  3. Step 3: Cross multiply
    858,431,355.40x = 1,287,647,033.10 × 212,199,099.40
  4. Step 4: Simplify right side
    858,431,355.40x = 273,237,540,768,901,984
  5. Step 5: Solve for x
    x = 273,237,540,768,901,984/858,431,355.40
  6. Step 6: Final answer
    x = 318,298,649.10

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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.