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Finding the Fourth Proportional to 647,998.80, 905,098.80 and 647,998.80

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Solution

The fourth proportional to 647,998.80, 905,098.80 and 647,998.80 is: 905,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,998.80 : 905,098.80 = 647,998.80 : x
  2. Step 2: Convert to fraction form
    647,998.80/905,098.80 = 647,998.80/x
  3. Step 3: Cross multiply
    647,998.80x = 905,098.80 × 647,998.80
  4. Step 4: Simplify right side
    647,998.80x = 586,502,936,281.44
  5. Step 5: Solve for x
    x = 586,502,936,281.44/647,998.80
  6. Step 6: Final answer
    x = 905,098.80

Related Problems

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Half scale
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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.