Home / 521,785,991.10-782,678,986.65-214,920,147.90

Finding the Fourth Proportional to 521,785,991.10, 782,678,986.65 and 214,920,147.90

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Solution

The fourth proportional to 521,785,991.10, 782,678,986.65 and 214,920,147.90 is: 322,380,221.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,785,991.10 : 782,678,986.65 = 214,920,147.90 : x
  2. Step 2: Convert to fraction form
    521,785,991.10/782,678,986.65 = 214,920,147.90/x
  3. Step 3: Cross multiply
    521,785,991.10x = 782,678,986.65 × 214,920,147.90
  4. Step 4: Simplify right side
    521,785,991.10x = 168,213,483,569,040,128
  5. Step 5: Solve for x
    x = 168,213,483,569,040,128/521,785,991.10
  6. Step 6: Final answer
    x = 322,380,221.85

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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.