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Finding the Fourth Proportional to 388,622.96, 582,367.47 and 172,220.68

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Solution

The fourth proportional to 388,622.96, 582,367.47 and 172,220.68 is: 258,079.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,622.96 : 582,367.47 = 172,220.68 : x
  2. Step 2: Convert to fraction form
    388,622.96/582,367.47 = 172,220.68/x
  3. Step 3: Cross multiply
    388,622.96x = 582,367.47 × 172,220.68
  4. Step 4: Simplify right side
    388,622.96x = 100,295,722,744.15
  5. Step 5: Solve for x
    x = 100,295,722,744.15/388,622.96
  6. Step 6: Final answer
    x = 258,079.76

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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.