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Finding the Fourth Proportional to 439,902.40, 659,270.40 and 389,747.20

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Solution

The fourth proportional to 439,902.40, 659,270.40 and 389,747.20 is: 584,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,902.40 : 659,270.40 = 389,747.20 : x
  2. Step 2: Convert to fraction form
    439,902.40/659,270.40 = 389,747.20/x
  3. Step 3: Cross multiply
    439,902.40x = 659,270.40 × 389,747.20
  4. Step 4: Simplify right side
    439,902.40x = 256,948,792,442.88
  5. Step 5: Solve for x
    x = 256,948,792,442.88/439,902.40
  6. Step 6: Final answer
    x = 584,104.09

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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.