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Finding the Fourth Proportional to 899,398.80, 1,241,186.64 and 491,517.90

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Solution

The fourth proportional to 899,398.80, 1,241,186.64 and 491,517.90 is: 678,303.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    899,398.80 : 1,241,186.64 = 491,517.90 : x
  2. Step 2: Convert to fraction form
    899,398.80/1,241,186.64 = 491,517.90/x
  3. Step 3: Cross multiply
    899,398.80x = 1,241,186.64 × 491,517.90
  4. Step 4: Simplify right side
    899,398.80x = 610,065,450,800.86
  5. Step 5: Solve for x
    x = 610,065,450,800.86/899,398.80
  6. Step 6: Final answer
    x = 678,303.61

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Double scale
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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.