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Finding the Fourth Proportional to 543,921.20, 815,881.80 and 488,808.80

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Solution

The fourth proportional to 543,921.20, 815,881.80 and 488,808.80 is: 733,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,921.20 : 815,881.80 = 488,808.80 : x
  2. Step 2: Convert to fraction form
    543,921.20/815,881.80 = 488,808.80/x
  3. Step 3: Cross multiply
    543,921.20x = 815,881.80 × 488,808.80
  4. Step 4: Simplify right side
    543,921.20x = 398,810,203,599.84
  5. Step 5: Solve for x
    x = 398,810,203,599.84/543,921.20
  6. Step 6: Final answer
    x = 733,213.20

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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.