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Finding the Fourth Proportional to 578,521.64, 866,287.20 and 399,160.12

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Solution

The fourth proportional to 578,521.64, 866,287.20 and 399,160.12 is: 597,708.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,521.64 : 866,287.20 = 399,160.12 : x
  2. Step 2: Convert to fraction form
    578,521.64/866,287.20 = 399,160.12/x
  3. Step 3: Cross multiply
    578,521.64x = 866,287.20 × 399,160.12
  4. Step 4: Simplify right side
    578,521.64x = 345,787,302,706.46
  5. Step 5: Solve for x
    x = 345,787,302,706.46/578,521.64
  6. Step 6: Final answer
    x = 597,708.50

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Double scale
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Similar ratio
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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.