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Finding the Fourth Proportional to 485,999.90, 670,678.87 and 271,127.15

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Solution

The fourth proportional to 485,999.90, 670,678.87 and 271,127.15 is: 374,154.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,999.90 : 670,678.87 = 271,127.15 : x
  2. Step 2: Convert to fraction form
    485,999.90/670,678.87 = 271,127.15/x
  3. Step 3: Cross multiply
    485,999.90x = 670,678.87 × 271,127.15
  4. Step 4: Simplify right side
    485,999.90x = 181,839,245,879.29
  5. Step 5: Solve for x
    x = 181,839,245,879.29/485,999.90
  6. Step 6: Final answer
    x = 374,154.91

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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.