Home / 817,815.40-1,226,723.10-256,906.60

Finding the Fourth Proportional to 817,815.40, 1,226,723.10 and 256,906.60

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Solution

The fourth proportional to 817,815.40, 1,226,723.10 and 256,906.60 is: 385,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,815.40 : 1,226,723.10 = 256,906.60 : x
  2. Step 2: Convert to fraction form
    817,815.40/1,226,723.10 = 256,906.60/x
  3. Step 3: Cross multiply
    817,815.40x = 1,226,723.10 × 256,906.60
  4. Step 4: Simplify right side
    817,815.40x = 315,153,260,762.46
  5. Step 5: Solve for x
    x = 315,153,260,762.46/817,815.40
  6. Step 6: Final answer
    x = 385,359.90

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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.