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Finding the Third Proportional to 128,735,590 and 279,422,828

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Solution

The third proportional to 128,735,590 and 279,422,828 is: 606,492,088.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,735,590 : 279,422,828 = 279,422,828 : x
  2. Step 2: Convert to fraction form
    128,735,590/279,422,828 = 279,422,828/x
  3. Step 3: Cross multiply
    128,735,590x = 279,422,828 × 279,422,828
  4. Step 4: Simplify right side
    128,735,590x = 78,077,116,807,517,584
  5. Step 5: Solve for x
    x = 78,077,116,807,517,584/128,735,590
  6. Step 6: Final answer
    x = 606,492,088.22

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.