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Finding the Fourth Proportional to 664,649.40, 996,974.10 and 221,417.40

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Solution

The fourth proportional to 664,649.40, 996,974.10 and 221,417.40 is: 332,126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,649.40 : 996,974.10 = 221,417.40 : x
  2. Step 2: Convert to fraction form
    664,649.40/996,974.10 = 221,417.40/x
  3. Step 3: Cross multiply
    664,649.40x = 996,974.10 × 221,417.40
  4. Step 4: Simplify right side
    664,649.40x = 220,747,413,089.34
  5. Step 5: Solve for x
    x = 220,747,413,089.34/664,649.40
  6. Step 6: Final answer
    x = 332,126.10

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Half scale
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Double scale
Find fourth proportional to 664,650.40, 996,975.60 and 221,418.40
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.