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Finding the Third Proportional to 390,063.75 and 851,910

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Solution

The third proportional to 390,063.75 and 851,910 is: 1,860,594.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,063.75 : 851,910 = 851,910 : x
  2. Step 2: Convert to fraction form
    390,063.75/851,910 = 851,910/x
  3. Step 3: Cross multiply
    390,063.75x = 851,910 × 851,910
  4. Step 4: Simplify right side
    390,063.75x = 725,750,648,100
  5. Step 5: Solve for x
    x = 725,750,648,100/390,063.75
  6. Step 6: Final answer
    x = 1,860,594.96

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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.