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Finding the Fourth Proportional to 259,751.20, 389,626.80 and 218,416.90

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Solution

The fourth proportional to 259,751.20, 389,626.80 and 218,416.90 is: 327,625.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,751.20 : 389,626.80 = 218,416.90 : x
  2. Step 2: Convert to fraction form
    259,751.20/389,626.80 = 218,416.90/x
  3. Step 3: Cross multiply
    259,751.20x = 389,626.80 × 218,416.90
  4. Step 4: Simplify right side
    259,751.20x = 85,101,077,812.92
  5. Step 5: Solve for x
    x = 85,101,077,812.92/259,751.20
  6. Step 6: Final answer
    x = 327,625.35

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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.