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Finding the Fourth Proportional to 1,986,896.58, 2,980,789.33 and 724,724.21

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Solution

The fourth proportional to 1,986,896.58, 2,980,789.33 and 724,724.21 is: 1,087,248.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,896.58 : 2,980,789.33 = 724,724.21 : x
  2. Step 2: Convert to fraction form
    1,986,896.58/2,980,789.33 = 724,724.21/x
  3. Step 3: Cross multiply
    1,986,896.58x = 2,980,789.33 × 724,724.21
  4. Step 4: Simplify right side
    1,986,896.58x = 2,160,250,175,644.92
  5. Step 5: Solve for x
    x = 2,160,250,175,644.92/1,986,896.58
  6. Step 6: Final answer
    x = 1,087,248.42

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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.