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Finding the Third Proportional to 309,139,728.75 and 666,705,648.75

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Solution

The third proportional to 309,139,728.75 and 666,705,648.75 is: 1,437,849,557.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,139,728.75 : 666,705,648.75 = 666,705,648.75 : x
  2. Step 2: Convert to fraction form
    309,139,728.75/666,705,648.75 = 666,705,648.75/x
  3. Step 3: Cross multiply
    309,139,728.75x = 666,705,648.75 × 666,705,648.75
  4. Step 4: Simplify right side
    309,139,728.75x = 444,496,422,075,158,400
  5. Step 5: Solve for x
    x = 444,496,422,075,158,400/309,139,728.75
  6. Step 6: Final answer
    x = 1,437,849,557.13

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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.