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Finding the Fourth Proportional to 663,086.75, 915,059.72 and 361,280.75

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Solution

The fourth proportional to 663,086.75, 915,059.72 and 361,280.75 is: 498,567.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,086.75 : 915,059.72 = 361,280.75 : x
  2. Step 2: Convert to fraction form
    663,086.75/915,059.72 = 361,280.75/x
  3. Step 3: Cross multiply
    663,086.75x = 915,059.72 × 361,280.75
  4. Step 4: Simplify right side
    663,086.75x = 330,593,460,129.99
  5. Step 5: Solve for x
    x = 330,593,460,129.99/663,086.75
  6. Step 6: Final answer
    x = 498,567.44

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.