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Finding the Fourth Proportional to 1,780,257.60, 2,669,205.60 and 981,921.60

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Solution

The fourth proportional to 1,780,257.60, 2,669,205.60 and 981,921.60 is: 1,472,231.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780,257.60 : 2,669,205.60 = 981,921.60 : x
  2. Step 2: Convert to fraction form
    1,780,257.60/2,669,205.60 = 981,921.60/x
  3. Step 3: Cross multiply
    1,780,257.60x = 2,669,205.60 × 981,921.60
  4. Step 4: Simplify right side
    1,780,257.60x = 2,620,950,633,480.96
  5. Step 5: Solve for x
    x = 2,620,950,633,480.96/1,780,257.60
  6. Step 6: Final answer
    x = 1,472,231.12

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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.