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Finding the Fourth Proportional to 826,633.40, 1,239,950.10 and 354,241.40

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Solution

The fourth proportional to 826,633.40, 1,239,950.10 and 354,241.40 is: 531,362.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,633.40 : 1,239,950.10 = 354,241.40 : x
  2. Step 2: Convert to fraction form
    826,633.40/1,239,950.10 = 354,241.40/x
  3. Step 3: Cross multiply
    826,633.40x = 1,239,950.10 × 354,241.40
  4. Step 4: Simplify right side
    826,633.40x = 439,241,659,354.14
  5. Step 5: Solve for x
    x = 439,241,659,354.14/826,633.40
  6. Step 6: Final answer
    x = 531,362.10

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Half scale
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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.