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Finding the Fourth Proportional to 280,852.80, 421,279.20 and 168,659.70

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Solution

The fourth proportional to 280,852.80, 421,279.20 and 168,659.70 is: 252,989.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,852.80 : 421,279.20 = 168,659.70 : x
  2. Step 2: Convert to fraction form
    280,852.80/421,279.20 = 168,659.70/x
  3. Step 3: Cross multiply
    280,852.80x = 421,279.20 × 168,659.70
  4. Step 4: Simplify right side
    280,852.80x = 71,052,823,488.24
  5. Step 5: Solve for x
    x = 71,052,823,488.24/280,852.80
  6. Step 6: Final answer
    x = 252,989.55

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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.