Home / 664,623.40-996,935.10-221,391.40

Finding the Fourth Proportional to 664,623.40, 996,935.10 and 221,391.40

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Solution

The fourth proportional to 664,623.40, 996,935.10 and 221,391.40 is: 332,087.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,623.40 : 996,935.10 = 221,391.40 : x
  2. Step 2: Convert to fraction form
    664,623.40/996,935.10 = 221,391.40/x
  3. Step 3: Cross multiply
    664,623.40x = 996,935.10 × 221,391.40
  4. Step 4: Simplify right side
    664,623.40x = 220,712,857,498.14
  5. Step 5: Solve for x
    x = 220,712,857,498.14/664,623.40
  6. Step 6: Final answer
    x = 332,087.10

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Half scale
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Double scale
Find fourth proportional to 664,624.40, 996,936.60 and 221,392.40
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.