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Finding the Fourth Proportional to 1,294,830, 1,786,844.88 and 721,905.12

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Solution

The fourth proportional to 1,294,830, 1,786,844.88 and 721,905.12 is: 996,217.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,830 : 1,786,844.88 = 721,905.12 : x
  2. Step 2: Convert to fraction form
    1,294,830/1,786,844.88 = 721,905.12/x
  3. Step 3: Cross multiply
    1,294,830x = 1,786,844.88 × 721,905.12
  4. Step 4: Simplify right side
    1,294,830x = 1,289,932,467,517.79
  5. Step 5: Solve for x
    x = 1,289,932,467,517.79/1,294,830
  6. Step 6: Final answer
    x = 996,217.63

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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.