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Finding the Fourth Proportional to 1,789,845.60, 2,469,987.12 and 985,029.60

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Solution

The fourth proportional to 1,789,845.60, 2,469,987.12 and 985,029.60 is: 1,359,340.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789,845.60 : 2,469,987.12 = 985,029.60 : x
  2. Step 2: Convert to fraction form
    1,789,845.60/2,469,987.12 = 985,029.60/x
  3. Step 3: Cross multiply
    1,789,845.60x = 2,469,987.12 × 985,029.60
  4. Step 4: Simplify right side
    1,789,845.60x = 2,433,010,424,818.75
  5. Step 5: Solve for x
    x = 2,433,010,424,818.75/1,789,845.60
  6. Step 6: Final answer
    x = 1,359,340.95

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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.