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Finding the Fourth Proportional to 664,270.20, 996,405.30 and 221,038.20

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Solution

The fourth proportional to 664,270.20, 996,405.30 and 221,038.20 is: 331,557.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,270.20 : 996,405.30 = 221,038.20 : x
  2. Step 2: Convert to fraction form
    664,270.20/996,405.30 = 221,038.20/x
  3. Step 3: Cross multiply
    664,270.20x = 996,405.30 × 221,038.20
  4. Step 4: Simplify right side
    664,270.20x = 220,243,633,982.46
  5. Step 5: Solve for x
    x = 220,243,633,982.46/664,270.20
  6. Step 6: Final answer
    x = 331,557.30

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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.