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Finding the Fourth Proportional to 260,039.40, 389,751.90 and 110,279.40

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Solution

The fourth proportional to 260,039.40, 389,751.90 and 110,279.40 is: 165,288.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,039.40 : 389,751.90 = 110,279.40 : x
  2. Step 2: Convert to fraction form
    260,039.40/389,751.90 = 110,279.40/x
  3. Step 3: Cross multiply
    260,039.40x = 389,751.90 × 110,279.40
  4. Step 4: Simplify right side
    260,039.40x = 42,981,605,680.86
  5. Step 5: Solve for x
    x = 42,981,605,680.86/260,039.40
  6. Step 6: Final answer
    x = 165,288.82

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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.