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Finding the Third Proportional to 128,149,400 and 279,585,684

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Solution

The third proportional to 128,149,400 and 279,585,684 is: 609,976,751.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,149,400 : 279,585,684 = 279,585,684 : x
  2. Step 2: Convert to fraction form
    128,149,400/279,585,684 = 279,585,684/x
  3. Step 3: Cross multiply
    128,149,400x = 279,585,684 × 279,585,684
  4. Step 4: Simplify right side
    128,149,400x = 78,168,154,697,747,856
  5. Step 5: Solve for x
    x = 78,168,154,697,747,856/128,149,400
  6. Step 6: Final answer
    x = 609,976,751.34

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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.