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Finding the Fourth Proportional to 623,990.85, 861,107.22 and 352,056.30

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Solution

The fourth proportional to 623,990.85, 861,107.22 and 352,056.30 is: 485,837.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,990.85 : 861,107.22 = 352,056.30 : x
  2. Step 2: Convert to fraction form
    623,990.85/861,107.22 = 352,056.30/x
  3. Step 3: Cross multiply
    623,990.85x = 861,107.22 × 352,056.30
  4. Step 4: Simplify right side
    623,990.85x = 303,158,221,776.49
  5. Step 5: Solve for x
    x = 303,158,221,776.49/623,990.85
  6. Step 6: Final answer
    x = 485,837.61

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Double scale
Find fourth proportional to 623,991.85, 861,108.60 and 352,057.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.