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Finding the Fourth Proportional to 321,601.76, 443,780.64 and 178,359.20

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Solution

The fourth proportional to 321,601.76, 443,780.64 and 178,359.20 is: 246,119.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,601.76 : 443,780.64 = 178,359.20 : x
  2. Step 2: Convert to fraction form
    321,601.76/443,780.64 = 178,359.20/x
  3. Step 3: Cross multiply
    321,601.76x = 443,780.64 × 178,359.20
  4. Step 4: Simplify right side
    321,601.76x = 79,152,359,925.89
  5. Step 5: Solve for x
    x = 79,152,359,925.89/321,601.76
  6. Step 6: Final answer
    x = 246,119.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.