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Finding the Third Proportional to 193,488,938 and 420,988,840

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Solution

The third proportional to 193,488,938 and 420,988,840 is: 915,977,963.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,488,938 : 420,988,840 = 420,988,840 : x
  2. Step 2: Convert to fraction form
    193,488,938/420,988,840 = 420,988,840/x
  3. Step 3: Cross multiply
    193,488,938x = 420,988,840 × 420,988,840
  4. Step 4: Simplify right side
    193,488,938x = 177,231,603,404,545,600
  5. Step 5: Solve for x
    x = 177,231,603,404,545,600/193,488,938
  6. Step 6: Final answer
    x = 915,977,963.58

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.