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Finding the Fourth Proportional to 280,446.60, 420,220.62 and 147,321.48

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Solution

The fourth proportional to 280,446.60, 420,220.62 and 147,321.48 is: 220,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,446.60 : 420,220.62 = 147,321.48 : x
  2. Step 2: Convert to fraction form
    280,446.60/420,220.62 = 147,321.48/x
  3. Step 3: Cross multiply
    280,446.60x = 420,220.62 × 147,321.48
  4. Step 4: Simplify right side
    280,446.60x = 61,907,523,664.92
  5. Step 5: Solve for x
    x = 61,907,523,664.92/280,446.60
  6. Step 6: Final answer
    x = 220,746.21

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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.