Home / 521,636,999.85-782,455,499.78-279,772,295.85

Finding the Fourth Proportional to 521,636,999.85, 782,455,499.78 and 279,772,295.85

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Solution

The fourth proportional to 521,636,999.85, 782,455,499.78 and 279,772,295.85 is: 419,658,443.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,636,999.85 : 782,455,499.78 = 279,772,295.85 : x
  2. Step 2: Convert to fraction form
    521,636,999.85/782,455,499.78 = 279,772,295.85/x
  3. Step 3: Cross multiply
    521,636,999.85x = 782,455,499.78 × 279,772,295.85
  4. Step 4: Simplify right side
    521,636,999.85x = 218,909,371,572,510,912
  5. Step 5: Solve for x
    x = 218,909,371,572,510,912/521,636,999.85
  6. Step 6: Final answer
    x = 419,658,443.78

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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.