Home / 858,512,268.90-1,287,768,403.35-212,280,012.90

Finding the Fourth Proportional to 858,512,268.90, 1,287,768,403.35 and 212,280,012.90

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Solution

The fourth proportional to 858,512,268.90, 1,287,768,403.35 and 212,280,012.90 is: 318,420,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,512,268.90 : 1,287,768,403.35 = 212,280,012.90 : x
  2. Step 2: Convert to fraction form
    858,512,268.90/1,287,768,403.35 = 212,280,012.90/x
  3. Step 3: Cross multiply
    858,512,268.90x = 1,287,768,403.35 × 212,280,012.90
  4. Step 4: Simplify right side
    858,512,268.90x = 273,367,493,275,350,400
  5. Step 5: Solve for x
    x = 273,367,493,275,350,400/858,512,268.90
  6. Step 6: Final answer
    x = 318,420,019.35

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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.