Home / 885,685.96-1,328,520.18-405,777.60

Finding the Fourth Proportional to 885,685.96, 1,328,520.18 and 405,777.60

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Solution

The fourth proportional to 885,685.96, 1,328,520.18 and 405,777.60 is: 608,662.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,685.96 : 1,328,520.18 = 405,777.60 : x
  2. Step 2: Convert to fraction form
    885,685.96/1,328,520.18 = 405,777.60/x
  3. Step 3: Cross multiply
    885,685.96x = 1,328,520.18 × 405,777.60
  4. Step 4: Simplify right side
    885,685.96x = 539,083,731,713.63
  5. Step 5: Solve for x
    x = 539,083,731,713.63/885,685.96
  6. Step 6: Final answer
    x = 608,662.39

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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.