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Finding the Fourth Proportional to 485,971.88, 670,641.48 and 271,111.94

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Solution

The fourth proportional to 485,971.88, 670,641.48 and 271,111.94 is: 374,134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,971.88 : 670,641.48 = 271,111.94 : x
  2. Step 2: Convert to fraction form
    485,971.88/670,641.48 = 271,111.94/x
  3. Step 3: Cross multiply
    485,971.88x = 670,641.48 × 271,111.94
  4. Step 4: Simplify right side
    485,971.88x = 181,818,912,687.27
  5. Step 5: Solve for x
    x = 181,818,912,687.27/485,971.88
  6. Step 6: Final answer
    x = 374,134.64

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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.