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Finding the Fourth Proportional to 578,938.60, 868,407.90 and 204,999.40

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Solution

The fourth proportional to 578,938.60, 868,407.90 and 204,999.40 is: 307,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,938.60 : 868,407.90 = 204,999.40 : x
  2. Step 2: Convert to fraction form
    578,938.60/868,407.90 = 204,999.40/x
  3. Step 3: Cross multiply
    578,938.60x = 868,407.90 × 204,999.40
  4. Step 4: Simplify right side
    578,938.60x = 178,023,098,455.26
  5. Step 5: Solve for x
    x = 178,023,098,455.26/578,938.60
  6. Step 6: Final answer
    x = 307,499.10

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