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Finding the Fourth Proportional to 396,968.32, 547,678.44 and 253,812.16

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Solution

The fourth proportional to 396,968.32, 547,678.44 and 253,812.16 is: 350,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,968.32 : 547,678.44 = 253,812.16 : x
  2. Step 2: Convert to fraction form
    396,968.32/547,678.44 = 253,812.16/x
  3. Step 3: Cross multiply
    396,968.32x = 547,678.44 × 253,812.16
  4. Step 4: Simplify right side
    396,968.32x = 139,007,447,841.83
  5. Step 5: Solve for x
    x = 139,007,447,841.83/396,968.32
  6. Step 6: Final answer
    x = 350,172.65

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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.