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Finding the Fourth Proportional to 483,706.62, 725,576.31 and 128,720.97

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Solution

The fourth proportional to 483,706.62, 725,576.31 and 128,720.97 is: 193,085.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,706.62 : 725,576.31 = 128,720.97 : x
  2. Step 2: Convert to fraction form
    483,706.62/725,576.31 = 128,720.97/x
  3. Step 3: Cross multiply
    483,706.62x = 725,576.31 × 128,720.97
  4. Step 4: Simplify right side
    483,706.62x = 93,396,886,432.22
  5. Step 5: Solve for x
    x = 93,396,886,432.22/483,706.62
  6. Step 6: Final answer
    x = 193,085.81

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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.