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Finding the Fourth Proportional to 408,593.64, 612,890.44 and 128,132.76

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Solution

The fourth proportional to 408,593.64, 612,890.44 and 128,132.76 is: 192,199.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,593.64 : 612,890.44 = 128,132.76 : x
  2. Step 2: Convert to fraction form
    408,593.64/612,890.44 = 128,132.76/x
  3. Step 3: Cross multiply
    408,593.64x = 612,890.44 × 128,132.76
  4. Step 4: Simplify right side
    408,593.64x = 78,531,343,654.81
  5. Step 5: Solve for x
    x = 78,531,343,654.81/408,593.64
  6. Step 6: Final answer
    x = 192,199.13

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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.