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Finding the Fourth Proportional to 663,086.25, 915,059.03 and 361,280.25

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Solution

The fourth proportional to 663,086.25, 915,059.03 and 361,280.25 is: 498,566.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,086.25 : 915,059.03 = 361,280.25 : x
  2. Step 2: Convert to fraction form
    663,086.25/915,059.03 = 361,280.25/x
  3. Step 3: Cross multiply
    663,086.25x = 915,059.03 × 361,280.25
  4. Step 4: Simplify right side
    663,086.25x = 330,592,753,316.76
  5. Step 5: Solve for x
    x = 330,592,753,316.76/663,086.25
  6. Step 6: Final answer
    x = 498,566.75

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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.