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Finding the Fourth Proportional to 485,978.13, 670,650.11 and 271,118.20

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Solution

The fourth proportional to 485,978.13, 670,650.11 and 271,118.20 is: 374,143.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,978.13 : 670,650.11 = 271,118.20 : x
  2. Step 2: Convert to fraction form
    485,978.13/670,650.11 = 271,118.20/x
  3. Step 3: Cross multiply
    485,978.13x = 670,650.11 × 271,118.20
  4. Step 4: Simplify right side
    485,978.13x = 181,825,450,653.00
  5. Step 5: Solve for x
    x = 181,825,450,653.00/485,978.13
  6. Step 6: Final answer
    x = 374,143.28

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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.