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Finding the Fourth Proportional to 611,772.60, 917,658.90 and 399,196.20

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Solution

The fourth proportional to 611,772.60, 917,658.90 and 399,196.20 is: 598,794.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,772.60 : 917,658.90 = 399,196.20 : x
  2. Step 2: Convert to fraction form
    611,772.60/917,658.90 = 399,196.20/x
  3. Step 3: Cross multiply
    611,772.60x = 917,658.90 × 399,196.20
  4. Step 4: Simplify right side
    611,772.60x = 366,325,945,776.18
  5. Step 5: Solve for x
    x = 366,325,945,776.18/611,772.60
  6. Step 6: Final answer
    x = 598,794.30

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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.