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Finding the Fourth Proportional to 665,674.40, 998,511.60 and 559,386.20

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Solution

The fourth proportional to 665,674.40, 998,511.60 and 559,386.20 is: 839,079.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,674.40 : 998,511.60 = 559,386.20 : x
  2. Step 2: Convert to fraction form
    665,674.40/998,511.60 = 559,386.20/x
  3. Step 3: Cross multiply
    665,674.40x = 998,511.60 × 559,386.20
  4. Step 4: Simplify right side
    665,674.40x = 558,553,609,579.92
  5. Step 5: Solve for x
    x = 558,553,609,579.92/665,674.40
  6. Step 6: Final answer
    x = 839,079.30

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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.