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Finding the Fourth Proportional to 280,615.13, 421,027.26 and 168,375.90

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Solution

The fourth proportional to 280,615.13, 421,027.26 and 168,375.90 is: 252,626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,615.13 : 421,027.26 = 168,375.90 : x
  2. Step 2: Convert to fraction form
    280,615.13/421,027.26 = 168,375.90/x
  3. Step 3: Cross multiply
    280,615.13x = 421,027.26 × 168,375.90
  4. Step 4: Simplify right side
    280,615.13x = 70,890,843,827.03
  5. Step 5: Solve for x
    x = 70,890,843,827.03/280,615.13
  6. Step 6: Final answer
    x = 252,626.60

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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.