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Finding the Fourth Proportional to 489,239.40, 733,859.10 and 320,840.40

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Solution

The fourth proportional to 489,239.40, 733,859.10 and 320,840.40 is: 481,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,239.40 : 733,859.10 = 320,840.40 : x
  2. Step 2: Convert to fraction form
    489,239.40/733,859.10 = 320,840.40/x
  3. Step 3: Cross multiply
    489,239.40x = 733,859.10 × 320,840.40
  4. Step 4: Simplify right side
    489,239.40x = 235,451,647,187.64
  5. Step 5: Solve for x
    x = 235,451,647,187.64/489,239.40
  6. Step 6: Final answer
    x = 481,260.60

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Double scale
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Similar ratio
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1.5x scale

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.