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Finding the Fourth Proportional to 617,843.20, 926,764.80 and 485,132.80

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Solution

The fourth proportional to 617,843.20, 926,764.80 and 485,132.80 is: 727,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,843.20 : 926,764.80 = 485,132.80 : x
  2. Step 2: Convert to fraction form
    617,843.20/926,764.80 = 485,132.80/x
  3. Step 3: Cross multiply
    617,843.20x = 926,764.80 × 485,132.80
  4. Step 4: Simplify right side
    617,843.20x = 449,604,002,365.44
  5. Step 5: Solve for x
    x = 449,604,002,365.44/617,843.20
  6. Step 6: Final answer
    x = 727,699.20

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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.