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Finding the Fourth Proportional to 623,719.80, 935,579.70 and 445,260.60

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Solution

The fourth proportional to 623,719.80, 935,579.70 and 445,260.60 is: 667,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,719.80 : 935,579.70 = 445,260.60 : x
  2. Step 2: Convert to fraction form
    623,719.80/935,579.70 = 445,260.60/x
  3. Step 3: Cross multiply
    623,719.80x = 935,579.70 × 445,260.60
  4. Step 4: Simplify right side
    623,719.80x = 416,576,778,569.82
  5. Step 5: Solve for x
    x = 416,576,778,569.82/623,719.80
  6. Step 6: Final answer
    x = 667,890.90

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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.