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Finding the Fourth Proportional to 777,660.40, 1,166,490.60 and 278,959.60

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Solution

The fourth proportional to 777,660.40, 1,166,490.60 and 278,959.60 is: 418,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,660.40 : 1,166,490.60 = 278,959.60 : x
  2. Step 2: Convert to fraction form
    777,660.40/1,166,490.60 = 278,959.60/x
  3. Step 3: Cross multiply
    777,660.40x = 1,166,490.60 × 278,959.60
  4. Step 4: Simplify right side
    777,660.40x = 325,403,751,179.76
  5. Step 5: Solve for x
    x = 325,403,751,179.76/777,660.40
  6. Step 6: Final answer
    x = 418,439.40

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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.