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Finding the Fourth Proportional to 291,856.80, 436,813.20 and 211,666.80

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Solution

The fourth proportional to 291,856.80, 436,813.20 and 211,666.80 is: 316,795.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,856.80 : 436,813.20 = 211,666.80 : x
  2. Step 2: Convert to fraction form
    291,856.80/436,813.20 = 211,666.80/x
  3. Step 3: Cross multiply
    291,856.80x = 436,813.20 × 211,666.80
  4. Step 4: Simplify right side
    291,856.80x = 92,458,852,241.76
  5. Step 5: Solve for x
    x = 92,458,852,241.76/291,856.80
  6. Step 6: Final answer
    x = 316,795.26

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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.