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Finding the Fourth Proportional to 551,152.44, 760,540.78 and 321,729.64

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Solution

The fourth proportional to 551,152.44, 760,540.78 and 321,729.64 is: 443,957.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,152.44 : 760,540.78 = 321,729.64 : x
  2. Step 2: Convert to fraction form
    551,152.44/760,540.78 = 321,729.64/x
  3. Step 3: Cross multiply
    551,152.44x = 760,540.78 × 321,729.64
  4. Step 4: Simplify right side
    551,152.44x = 244,688,511,354.72
  5. Step 5: Solve for x
    x = 244,688,511,354.72/551,152.44
  6. Step 6: Final answer
    x = 443,957.96

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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.