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Finding the Third Proportional to 287,890,938 and 621,656,010

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Solution

The third proportional to 287,890,938 and 621,656,010 is: 1,342,370,126.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,890,938 : 621,656,010 = 621,656,010 : x
  2. Step 2: Convert to fraction form
    287,890,938/621,656,010 = 621,656,010/x
  3. Step 3: Cross multiply
    287,890,938x = 621,656,010 × 621,656,010
  4. Step 4: Simplify right side
    287,890,938x = 386,456,194,769,120,128
  5. Step 5: Solve for x
    x = 386,456,194,769,120,128/287,890,938
  6. Step 6: Final answer
    x = 1,342,370,126.18

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.