Home / 405,965.10-608,947.65-394,301.10

Finding the Fourth Proportional to 405,965.10, 608,947.65 and 394,301.10

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Solution

The fourth proportional to 405,965.10, 608,947.65 and 394,301.10 is: 591,451.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,965.10 : 608,947.65 = 394,301.10 : x
  2. Step 2: Convert to fraction form
    405,965.10/608,947.65 = 394,301.10/x
  3. Step 3: Cross multiply
    405,965.10x = 608,947.65 × 394,301.10
  4. Step 4: Simplify right side
    405,965.10x = 240,108,728,237.42
  5. Step 5: Solve for x
    x = 240,108,728,237.42/405,965.10
  6. Step 6: Final answer
    x = 591,451.65

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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.