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Finding the Fourth Proportional to 485,879.12, 670,514.24 and 271,013.68

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Solution

The fourth proportional to 485,879.12, 670,514.24 and 271,013.68 is: 373,999.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,879.12 : 670,514.24 = 271,013.68 : x
  2. Step 2: Convert to fraction form
    485,879.12/670,514.24 = 271,013.68/x
  3. Step 3: Cross multiply
    485,879.12x = 670,514.24 × 271,013.68
  4. Step 4: Simplify right side
    485,879.12x = 181,718,531,674.80
  5. Step 5: Solve for x
    x = 181,718,531,674.80/485,879.12
  6. Step 6: Final answer
    x = 373,999.47

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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.