Home / 858,431,357.40-1,287,647,036.10-212,199,101.40

Finding the Fourth Proportional to 858,431,357.40, 1,287,647,036.10 and 212,199,101.40

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Solution

The fourth proportional to 858,431,357.40, 1,287,647,036.10 and 212,199,101.40 is: 318,298,652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,357.40 : 1,287,647,036.10 = 212,199,101.40 : x
  2. Step 2: Convert to fraction form
    858,431,357.40/1,287,647,036.10 = 212,199,101.40/x
  3. Step 3: Cross multiply
    858,431,357.40x = 1,287,647,036.10 × 212,199,101.40
  4. Step 4: Simplify right side
    858,431,357.40x = 273,237,543,980,793,344
  5. Step 5: Solve for x
    x = 273,237,543,980,793,344/858,431,357.40
  6. Step 6: Final answer
    x = 318,298,652.10

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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.