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Finding the Fourth Proportional to 291,379.20, 436,809.60 and 191,587.20

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Solution

The fourth proportional to 291,379.20, 436,809.60 and 191,587.20 is: 287,210.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,379.20 : 436,809.60 = 191,587.20 : x
  2. Step 2: Convert to fraction form
    291,379.20/436,809.60 = 191,587.20/x
  3. Step 3: Cross multiply
    291,379.20x = 436,809.60 × 191,587.20
  4. Step 4: Simplify right side
    291,379.20x = 83,687,128,197.12
  5. Step 5: Solve for x
    x = 83,687,128,197.12/291,379.20
  6. Step 6: Final answer
    x = 287,210.37

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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.