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Finding the Fourth Proportional to 485,999.60, 670,679.87 and 271,139.71

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Solution

The fourth proportional to 485,999.60, 670,679.87 and 271,139.71 is: 374,173.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,999.60 : 670,679.87 = 271,139.71 : x
  2. Step 2: Convert to fraction form
    485,999.60/670,679.87 = 271,139.71/x
  3. Step 3: Cross multiply
    485,999.60x = 670,679.87 × 271,139.71
  4. Step 4: Simplify right side
    485,999.60x = 181,847,943,100.09
  5. Step 5: Solve for x
    x = 181,847,943,100.09/485,999.60
  6. Step 6: Final answer
    x = 374,173.03

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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.