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Finding the Third Proportional to 129,388,776 and 278,507,289

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Solution

The third proportional to 129,388,776 and 278,507,289 is: 599,482,524.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,388,776 : 278,507,289 = 278,507,289 : x
  2. Step 2: Convert to fraction form
    129,388,776/278,507,289 = 278,507,289/x
  3. Step 3: Cross multiply
    129,388,776x = 278,507,289 × 278,507,289
  4. Step 4: Simplify right side
    129,388,776x = 77,566,310,026,129,520
  5. Step 5: Solve for x
    x = 77,566,310,026,129,520/129,388,776
  6. Step 6: Final answer
    x = 599,482,524.10

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.