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Finding the Fourth Proportional to 485,985.26, 670,646.72 and 271,119.80

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Solution

The fourth proportional to 485,985.26, 670,646.72 and 271,119.80 is: 374,138.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,985.26 : 670,646.72 = 271,119.80 : x
  2. Step 2: Convert to fraction form
    485,985.26/670,646.72 = 271,119.80/x
  3. Step 3: Cross multiply
    485,985.26x = 670,646.72 × 271,119.80
  4. Step 4: Simplify right side
    485,985.26x = 181,825,606,951.47
  5. Step 5: Solve for x
    x = 181,825,606,951.47/485,985.26
  6. Step 6: Final answer
    x = 374,138.11

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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.