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Finding the Fourth Proportional to 438,608.40, 657,912.60 and 281,144.40

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Solution

The fourth proportional to 438,608.40, 657,912.60 and 281,144.40 is: 421,716.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,608.40 : 657,912.60 = 281,144.40 : x
  2. Step 2: Convert to fraction form
    438,608.40/657,912.60 = 281,144.40/x
  3. Step 3: Cross multiply
    438,608.40x = 657,912.60 × 281,144.40
  4. Step 4: Simplify right side
    438,608.40x = 184,968,443,179.44
  5. Step 5: Solve for x
    x = 184,968,443,179.44/438,608.40
  6. Step 6: Final answer
    x = 421,716.60

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Similar ratio
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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.