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Finding the Fourth Proportional to 486,615.85, 671,481.90 and 271,751.30

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Solution

The fourth proportional to 486,615.85, 671,481.90 and 271,751.30 is: 374,990.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,615.85 : 671,481.90 = 271,751.30 : x
  2. Step 2: Convert to fraction form
    486,615.85/671,481.90 = 271,751.30/x
  3. Step 3: Cross multiply
    486,615.85x = 671,481.90 × 271,751.30
  4. Step 4: Simplify right side
    486,615.85x = 182,476,082,189.20
  5. Step 5: Solve for x
    x = 182,476,082,189.20/486,615.85
  6. Step 6: Final answer
    x = 374,990.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.