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Finding the Fourth Proportional to 608,311.68, 839,191.09 and 393,521.01

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Solution

The fourth proportional to 608,311.68, 839,191.09 and 393,521.01 is: 542,878.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,311.68 : 839,191.09 = 393,521.01 : x
  2. Step 2: Convert to fraction form
    608,311.68/839,191.09 = 393,521.01/x
  3. Step 3: Cross multiply
    608,311.68x = 839,191.09 × 393,521.01
  4. Step 4: Simplify right side
    608,311.68x = 330,239,325,319.80
  5. Step 5: Solve for x
    x = 330,239,325,319.80/608,311.68
  6. Step 6: Final answer
    x = 542,878.49

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Double scale
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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.