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Finding the Fourth Proportional to 280,584.60, 420,366.60 and 161,903.40

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Solution

The fourth proportional to 280,584.60, 420,366.60 and 161,903.40 is: 242,560.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,584.60 : 420,366.60 = 161,903.40 : x
  2. Step 2: Convert to fraction form
    280,584.60/420,366.60 = 161,903.40/x
  3. Step 3: Cross multiply
    280,584.60x = 420,366.60 × 161,903.40
  4. Step 4: Simplify right side
    280,584.60x = 68,058,781,786.44
  5. Step 5: Solve for x
    x = 68,058,781,786.44/280,584.60
  6. Step 6: Final answer
    x = 242,560.65

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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.