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Finding the Fourth Proportional to 291,191.20, 436,806.75 and 98,987.41

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Solution

The fourth proportional to 291,191.20, 436,806.75 and 98,987.41 is: 148,487.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,191.20 : 436,806.75 = 98,987.41 : x
  2. Step 2: Convert to fraction form
    291,191.20/436,806.75 = 98,987.41/x
  3. Step 3: Cross multiply
    291,191.20x = 436,806.75 × 98,987.41
  4. Step 4: Simplify right side
    291,191.20x = 43,238,369,491.83
  5. Step 5: Solve for x
    x = 43,238,369,491.83/291,191.20
  6. Step 6: Final answer
    x = 148,487.90

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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.