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Finding the Fourth Proportional to 280,979.20, 421,699.20 and 271,763.20

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Solution

The fourth proportional to 280,979.20, 421,699.20 and 271,763.20 is: 407,867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,979.20 : 421,699.20 = 271,763.20 : x
  2. Step 2: Convert to fraction form
    280,979.20/421,699.20 = 271,763.20/x
  3. Step 3: Cross multiply
    280,979.20x = 421,699.20 × 271,763.20
  4. Step 4: Simplify right side
    280,979.20x = 114,602,324,029.44
  5. Step 5: Solve for x
    x = 114,602,324,029.44/280,979.20
  6. Step 6: Final answer
    x = 407,867.64

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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.