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Finding the Fourth Proportional to 521,605,477.80, 782,408,216.70 and 279,740,773.80

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Solution

The fourth proportional to 521,605,477.80, 782,408,216.70 and 279,740,773.80 is: 419,611,160.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,605,477.80 : 782,408,216.70 = 279,740,773.80 : x
  2. Step 2: Convert to fraction form
    521,605,477.80/782,408,216.70 = 279,740,773.80/x
  3. Step 3: Cross multiply
    521,605,477.80x = 782,408,216.70 × 279,740,773.80
  4. Step 4: Simplify right side
    521,605,477.80x = 218,871,479,967,136,096
  5. Step 5: Solve for x
    x = 218,871,479,967,136,096/521,605,477.80
  6. Step 6: Final answer
    x = 419,611,160.70

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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.