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Finding the Fourth Proportional to 219,967,640.70, 308,815,631.40 and 219,967,640.70

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Solution

The fourth proportional to 219,967,640.70, 308,815,631.40 and 219,967,640.70 is: 308,815,631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,967,640.70 : 308,815,631.40 = 219,967,640.70 : x
  2. Step 2: Convert to fraction form
    219,967,640.70/308,815,631.40 = 219,967,640.70/x
  3. Step 3: Cross multiply
    219,967,640.70x = 308,815,631.40 × 219,967,640.70
  4. Step 4: Simplify right side
    219,967,640.70x = 67,929,445,850,338,832
  5. Step 5: Solve for x
    x = 67,929,445,850,338,832/219,967,640.70
  6. Step 6: Final answer
    x = 308,815,631.40

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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.