Home / 858,431,353.90-1,287,647,030.85-212,199,097.90

Finding the Fourth Proportional to 858,431,353.90, 1,287,647,030.85 and 212,199,097.90

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Solution

The fourth proportional to 858,431,353.90, 1,287,647,030.85 and 212,199,097.90 is: 318,298,646.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,353.90 : 1,287,647,030.85 = 212,199,097.90 : x
  2. Step 2: Convert to fraction form
    858,431,353.90/1,287,647,030.85 = 212,199,097.90/x
  3. Step 3: Cross multiply
    858,431,353.90x = 1,287,647,030.85 × 212,199,097.90
  4. Step 4: Simplify right side
    858,431,353.90x = 273,237,538,359,983,456
  5. Step 5: Solve for x
    x = 273,237,538,359,983,456/858,431,353.90
  6. Step 6: Final answer
    x = 318,298,646.85

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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.