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Finding the Fourth Proportional to 291,376.80, 436,978.80 and 113,781.60

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Solution

The fourth proportional to 291,376.80, 436,978.80 and 113,781.60 is: 170,638.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,376.80 : 436,978.80 = 113,781.60 : x
  2. Step 2: Convert to fraction form
    291,376.80/436,978.80 = 113,781.60/x
  3. Step 3: Cross multiply
    291,376.80x = 436,978.80 × 113,781.60
  4. Step 4: Simplify right side
    291,376.80x = 49,720,147,030.08
  5. Step 5: Solve for x
    x = 49,720,147,030.08/291,376.80
  6. Step 6: Final answer
    x = 170,638.66

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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.