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Finding the Fourth Proportional to 818,705.05, 1,129,046.65 and 647,033.14

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Solution

The fourth proportional to 818,705.05, 1,129,046.65 and 647,033.14 is: 892,300.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,705.05 : 1,129,046.65 = 647,033.14 : x
  2. Step 2: Convert to fraction form
    818,705.05/1,129,046.65 = 647,033.14/x
  3. Step 3: Cross multiply
    818,705.05x = 1,129,046.65 × 647,033.14
  4. Step 4: Simplify right side
    818,705.05x = 730,530,599,155.98
  5. Step 5: Solve for x
    x = 730,530,599,155.98/818,705.05
  6. Step 6: Final answer
    x = 892,300.10

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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.