Home / 858,512,269.90-1,287,768,404.85-212,280,013.90

Finding the Fourth Proportional to 858,512,269.90, 1,287,768,404.85 and 212,280,013.90

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Solution

The fourth proportional to 858,512,269.90, 1,287,768,404.85 and 212,280,013.90 is: 318,420,020.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,512,269.90 : 1,287,768,404.85 = 212,280,013.90 : x
  2. Step 2: Convert to fraction form
    858,512,269.90/1,287,768,404.85 = 212,280,013.90/x
  3. Step 3: Cross multiply
    858,512,269.90x = 1,287,768,404.85 × 212,280,013.90
  4. Step 4: Simplify right side
    858,512,269.90x = 273,367,494,881,538,816
  5. Step 5: Solve for x
    x = 273,367,494,881,538,816/858,512,269.90
  6. Step 6: Final answer
    x = 318,420,020.85

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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.