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Finding the Third Proportional to 299,779.50 and 642,292.50

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Solution

The third proportional to 299,779.50 and 642,292.50 is: 1,376,143.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,779.50 : 642,292.50 = 642,292.50 : x
  2. Step 2: Convert to fraction form
    299,779.50/642,292.50 = 642,292.50/x
  3. Step 3: Cross multiply
    299,779.50x = 642,292.50 × 642,292.50
  4. Step 4: Simplify right side
    299,779.50x = 412,539,655,556.25
  5. Step 5: Solve for x
    x = 412,539,655,556.25/299,779.50
  6. Step 6: Final answer
    x = 1,376,143.65

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.