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Finding the Fourth Proportional to 678,611.01, 936,598.41 and 392,297.07

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Solution

The fourth proportional to 678,611.01, 936,598.41 and 392,297.07 is: 541,436.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,611.01 : 936,598.41 = 392,297.07 : x
  2. Step 2: Convert to fraction form
    678,611.01/936,598.41 = 392,297.07/x
  3. Step 3: Cross multiply
    678,611.01x = 936,598.41 × 392,297.07
  4. Step 4: Simplify right side
    678,611.01x = 367,424,812,009.66
  5. Step 5: Solve for x
    x = 367,424,812,009.66/678,611.01
  6. Step 6: Final answer
    x = 541,436.56

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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.