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Finding the Fourth Proportional to 212,620,496.80, 298,474,911.20 and 212,620,496.80

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Solution

The fourth proportional to 212,620,496.80, 298,474,911.20 and 212,620,496.80 is: 298,474,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,620,496.80 : 298,474,911.20 = 212,620,496.80 : x
  2. Step 2: Convert to fraction form
    212,620,496.80/298,474,911.20 = 212,620,496.80/x
  3. Step 3: Cross multiply
    212,620,496.80x = 298,474,911.20 × 212,620,496.80
  4. Step 4: Simplify right side
    212,620,496.80x = 63,461,883,901,679,888
  5. Step 5: Solve for x
    x = 63,461,883,901,679,888/212,620,496.80
  6. Step 6: Final answer
    x = 298,474,911.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.