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Finding the Fourth Proportional to 388,321.30, 582,211.13 and 172,062.41

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Solution

The fourth proportional to 388,321.30, 582,211.13 and 172,062.41 is: 257,973.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,321.30 : 582,211.13 = 172,062.41 : x
  2. Step 2: Convert to fraction form
    388,321.30/582,211.13 = 172,062.41/x
  3. Step 3: Cross multiply
    388,321.30x = 582,211.13 × 172,062.41
  4. Step 4: Simplify right side
    388,321.30x = 100,176,649,536.40
  5. Step 5: Solve for x
    x = 100,176,649,536.40/388,321.30
  6. Step 6: Final answer
    x = 257,973.62

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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.