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Finding the Fourth Proportional to 280,735.70, 421,103.55 and 112,336.70

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Solution

The fourth proportional to 280,735.70, 421,103.55 and 112,336.70 is: 168,505.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,735.70 : 421,103.55 = 112,336.70 : x
  2. Step 2: Convert to fraction form
    280,735.70/421,103.55 = 112,336.70/x
  3. Step 3: Cross multiply
    280,735.70x = 421,103.55 × 112,336.70
  4. Step 4: Simplify right side
    280,735.70x = 47,305,383,165.29
  5. Step 5: Solve for x
    x = 47,305,383,165.29/280,735.70
  6. Step 6: Final answer
    x = 168,505.05

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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.