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Finding the Fourth Proportional to 665,109.80, 997,664.70 and 654,612.20

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Solution

The fourth proportional to 665,109.80, 997,664.70 and 654,612.20 is: 981,918.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,109.80 : 997,664.70 = 654,612.20 : x
  2. Step 2: Convert to fraction form
    665,109.80/997,664.70 = 654,612.20/x
  3. Step 3: Cross multiply
    665,109.80x = 997,664.70 × 654,612.20
  4. Step 4: Simplify right side
    665,109.80x = 653,083,484,129.34
  5. Step 5: Solve for x
    x = 653,083,484,129.34/665,109.80
  6. Step 6: Final answer
    x = 981,918.30

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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.