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Finding the Fourth Proportional to 664,281.20, 996,421.80 and 221,049.20

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Solution

The fourth proportional to 664,281.20, 996,421.80 and 221,049.20 is: 331,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,281.20 : 996,421.80 = 221,049.20 : x
  2. Step 2: Convert to fraction form
    664,281.20/996,421.80 = 221,049.20/x
  3. Step 3: Cross multiply
    664,281.20x = 996,421.80 × 221,049.20
  4. Step 4: Simplify right side
    664,281.20x = 220,258,241,752.56
  5. Step 5: Solve for x
    x = 220,258,241,752.56/664,281.20
  6. Step 6: Final answer
    x = 331,573.80

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