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Finding the Fourth Proportional to 545,107.20, 817,660.80 and 145,809.60

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Solution

The fourth proportional to 545,107.20, 817,660.80 and 145,809.60 is: 218,714.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,107.20 : 817,660.80 = 145,809.60 : x
  2. Step 2: Convert to fraction form
    545,107.20/817,660.80 = 145,809.60/x
  3. Step 3: Cross multiply
    545,107.20x = 817,660.80 × 145,809.60
  4. Step 4: Simplify right side
    545,107.20x = 119,222,794,183.68
  5. Step 5: Solve for x
    x = 119,222,794,183.68/545,107.20
  6. Step 6: Final answer
    x = 218,714.40

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Similar ratio
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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.