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Finding the Fourth Proportional to 395,915.15, 546,234.45 and 223,816.47

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Solution

The fourth proportional to 395,915.15, 546,234.45 and 223,816.47 is: 308,794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,915.15 : 546,234.45 = 223,816.47 : x
  2. Step 2: Convert to fraction form
    395,915.15/546,234.45 = 223,816.47/x
  3. Step 3: Cross multiply
    395,915.15x = 546,234.45 × 223,816.47
  4. Step 4: Simplify right side
    395,915.15x = 122,256,266,391.39
  5. Step 5: Solve for x
    x = 122,256,266,391.39/395,915.15
  6. Step 6: Final answer
    x = 308,794.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.