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Finding the Fourth Proportional to 485,093.40, 727,985.70 and 204,811.80

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Solution

The fourth proportional to 485,093.40, 727,985.70 and 204,811.80 is: 307,363.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,093.40 : 727,985.70 = 204,811.80 : x
  2. Step 2: Convert to fraction form
    485,093.40/727,985.70 = 204,811.80/x
  3. Step 3: Cross multiply
    485,093.40x = 727,985.70 × 204,811.80
  4. Step 4: Simplify right side
    485,093.40x = 149,100,061,591.26
  5. Step 5: Solve for x
    x = 149,100,061,591.26/485,093.40
  6. Step 6: Final answer
    x = 307,363.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.