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Finding the Fourth Proportional to 485,998.58, 670,678.46 and 271,138.69

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Solution

The fourth proportional to 485,998.58, 670,678.46 and 271,138.69 is: 374,171.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,998.58 : 670,678.46 = 271,138.69 : x
  2. Step 2: Convert to fraction form
    485,998.58/670,678.46 = 271,138.69/x
  3. Step 3: Cross multiply
    485,998.58x = 670,678.46 × 271,138.69
  4. Step 4: Simplify right side
    485,998.58x = 181,846,881,080.20
  5. Step 5: Solve for x
    x = 181,846,881,080.20/485,998.58
  6. Step 6: Final answer
    x = 374,171.63

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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.