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Finding the Fourth Proportional to 662,996.80, 994,495.20 and 219,764.80

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Solution

The fourth proportional to 662,996.80, 994,495.20 and 219,764.80 is: 329,647.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,996.80 : 994,495.20 = 219,764.80 : x
  2. Step 2: Convert to fraction form
    662,996.80/994,495.20 = 219,764.80/x
  3. Step 3: Cross multiply
    662,996.80x = 994,495.20 × 219,764.80
  4. Step 4: Simplify right side
    662,996.80x = 218,555,038,728.96
  5. Step 5: Solve for x
    x = 218,555,038,728.96/662,996.80
  6. Step 6: Final answer
    x = 329,647.20

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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.