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Finding the Fourth Proportional to 388,321.99, 582,212.16 and 172,063.10

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Solution

The fourth proportional to 388,321.99, 582,212.16 and 172,063.10 is: 257,974.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,321.99 : 582,212.16 = 172,063.10 : x
  2. Step 2: Convert to fraction form
    388,321.99/582,212.16 = 172,063.10/x
  3. Step 3: Cross multiply
    388,321.99x = 582,212.16 × 172,063.10
  4. Step 4: Simplify right side
    388,321.99x = 100,177,226,196.24
  5. Step 5: Solve for x
    x = 100,177,226,196.24/388,321.99
  6. Step 6: Final answer
    x = 257,974.64

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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.