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Finding the Fourth Proportional to 489,213.40, 733,820.10 and 320,814.40

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Solution

The fourth proportional to 489,213.40, 733,820.10 and 320,814.40 is: 481,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,213.40 : 733,820.10 = 320,814.40 : x
  2. Step 2: Convert to fraction form
    489,213.40/733,820.10 = 320,814.40/x
  3. Step 3: Cross multiply
    489,213.40x = 733,820.10 × 320,814.40
  4. Step 4: Simplify right side
    489,213.40x = 235,420,055,089.44
  5. Step 5: Solve for x
    x = 235,420,055,089.44/489,213.40
  6. Step 6: Final answer
    x = 481,221.60

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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.