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Finding the Fourth Proportional to 403,086.76, 556,243.05 and 219,326.09

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Solution

The fourth proportional to 403,086.76, 556,243.05 and 219,326.09 is: 302,660.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,086.76 : 556,243.05 = 219,326.09 : x
  2. Step 2: Convert to fraction form
    403,086.76/556,243.05 = 219,326.09/x
  3. Step 3: Cross multiply
    403,086.76x = 556,243.05 × 219,326.09
  4. Step 4: Simplify right side
    403,086.76x = 121,998,613,246.18
  5. Step 5: Solve for x
    x = 121,998,613,246.18/403,086.76
  6. Step 6: Final answer
    x = 302,660.93

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Half scale
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Double scale
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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.