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Finding the Fourth Proportional to 659,907.80, 989,861.70 and 491,946.20

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Solution

The fourth proportional to 659,907.80, 989,861.70 and 491,946.20 is: 737,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,907.80 : 989,861.70 = 491,946.20 : x
  2. Step 2: Convert to fraction form
    659,907.80/989,861.70 = 491,946.20/x
  3. Step 3: Cross multiply
    659,907.80x = 989,861.70 × 491,946.20
  4. Step 4: Simplify right side
    659,907.80x = 486,958,701,840.54
  5. Step 5: Solve for x
    x = 486,958,701,840.54/659,907.80
  6. Step 6: Final answer
    x = 737,919.30

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Similar ratio
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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.