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Finding the Fourth Proportional to 538,853.60, 808,280.40 and 405,009.20

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Solution

The fourth proportional to 538,853.60, 808,280.40 and 405,009.20 is: 607,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,853.60 : 808,280.40 = 405,009.20 : x
  2. Step 2: Convert to fraction form
    538,853.60/808,280.40 = 405,009.20/x
  3. Step 3: Cross multiply
    538,853.60x = 808,280.40 × 405,009.20
  4. Step 4: Simplify right side
    538,853.60x = 327,360,998,179.68
  5. Step 5: Solve for x
    x = 327,360,998,179.68/538,853.60
  6. Step 6: Final answer
    x = 607,513.80

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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.