Home / 578,939.10-868,408.65-204,999.90

Finding the Fourth Proportional to 578,939.10, 868,408.65 and 204,999.90

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Solution

The fourth proportional to 578,939.10, 868,408.65 and 204,999.90 is: 307,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,939.10 : 868,408.65 = 204,999.90 : x
  2. Step 2: Convert to fraction form
    578,939.10/868,408.65 = 204,999.90/x
  3. Step 3: Cross multiply
    578,939.10x = 868,408.65 × 204,999.90
  4. Step 4: Simplify right side
    578,939.10x = 178,023,686,409.14
  5. Step 5: Solve for x
    x = 178,023,686,409.14/578,939.10
  6. Step 6: Final answer
    x = 307,499.85

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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.