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Finding the Fourth Proportional to 681,187.60, 1,019,813.10 and 661,504.60

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Solution

The fourth proportional to 681,187.60, 1,019,813.10 and 661,504.60 is: 990,345.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,187.60 : 1,019,813.10 = 661,504.60 : x
  2. Step 2: Convert to fraction form
    681,187.60/1,019,813.10 = 661,504.60/x
  3. Step 3: Cross multiply
    681,187.60x = 1,019,813.10 × 661,504.60
  4. Step 4: Simplify right side
    681,187.60x = 674,611,056,790.26
  5. Step 5: Solve for x
    x = 674,611,056,790.26/681,187.60
  6. Step 6: Final answer
    x = 990,345.47

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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.