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Finding the Fourth Proportional to 823,687.10, 1,235,530.65 and 291,203.90

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Solution

The fourth proportional to 823,687.10, 1,235,530.65 and 291,203.90 is: 436,805.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,687.10 : 1,235,530.65 = 291,203.90 : x
  2. Step 2: Convert to fraction form
    823,687.10/1,235,530.65 = 291,203.90/x
  3. Step 3: Cross multiply
    823,687.10x = 1,235,530.65 × 291,203.90
  4. Step 4: Simplify right side
    823,687.10x = 359,791,343,849.54
  5. Step 5: Solve for x
    x = 359,791,343,849.54/823,687.10
  6. Step 6: Final answer
    x = 436,805.85

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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.