Home / 858,512,259.90-1,287,768,389.85-212,280,003.90

Finding the Fourth Proportional to 858,512,259.90, 1,287,768,389.85 and 212,280,003.90

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Solution

The fourth proportional to 858,512,259.90, 1,287,768,389.85 and 212,280,003.90 is: 318,420,005.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,512,259.90 : 1,287,768,389.85 = 212,280,003.90 : x
  2. Step 2: Convert to fraction form
    858,512,259.90/1,287,768,389.85 = 212,280,003.90/x
  3. Step 3: Cross multiply
    858,512,259.90x = 1,287,768,389.85 × 212,280,003.90
  4. Step 4: Simplify right side
    858,512,259.90x = 273,367,478,819,654,720
  5. Step 5: Solve for x
    x = 273,367,478,819,654,720/858,512,259.90
  6. Step 6: Final answer
    x = 318,420,005.85

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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.