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Finding the Fourth Proportional to 617,941.70, 926,912.55 and 485,231.30

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Solution

The fourth proportional to 617,941.70, 926,912.55 and 485,231.30 is: 727,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,941.70 : 926,912.55 = 485,231.30 : x
  2. Step 2: Convert to fraction form
    617,941.70/926,912.55 = 485,231.30/x
  3. Step 3: Cross multiply
    617,941.70x = 926,912.55 × 485,231.30
  4. Step 4: Simplify right side
    617,941.70x = 449,766,981,622.82
  5. Step 5: Solve for x
    x = 449,766,981,622.82/617,941.70
  6. Step 6: Final answer
    x = 727,846.95

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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.