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Finding the Fourth Proportional to 662,905.20, 994,357.80 and 347,458.80

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Solution

The fourth proportional to 662,905.20, 994,357.80 and 347,458.80 is: 521,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,905.20 : 994,357.80 = 347,458.80 : x
  2. Step 2: Convert to fraction form
    662,905.20/994,357.80 = 347,458.80/x
  3. Step 3: Cross multiply
    662,905.20x = 994,357.80 × 347,458.80
  4. Step 4: Simplify right side
    662,905.20x = 345,498,367,958.64
  5. Step 5: Solve for x
    x = 345,498,367,958.64/662,905.20
  6. Step 6: Final answer
    x = 521,188.20

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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.