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Finding the Fourth Proportional to 738,444, 1,019,052.72 and 398,912.40

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Solution

The fourth proportional to 738,444, 1,019,052.72 and 398,912.40 is: 550,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,444 : 1,019,052.72 = 398,912.40 : x
  2. Step 2: Convert to fraction form
    738,444/1,019,052.72 = 398,912.40/x
  3. Step 3: Cross multiply
    738,444x = 1,019,052.72 × 398,912.40
  4. Step 4: Simplify right side
    738,444x = 406,512,766,261.73
  5. Step 5: Solve for x
    x = 406,512,766,261.73/738,444
  6. Step 6: Final answer
    x = 550,499.11

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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.