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Finding the Fourth Proportional to 664,641.90, 996,962.85 and 221,409.90

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Solution

The fourth proportional to 664,641.90, 996,962.85 and 221,409.90 is: 332,114.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,641.90 : 996,962.85 = 221,409.90 : x
  2. Step 2: Convert to fraction form
    664,641.90/996,962.85 = 221,409.90/x
  3. Step 3: Cross multiply
    664,641.90x = 996,962.85 × 221,409.90
  4. Step 4: Simplify right side
    664,641.90x = 220,737,444,922.22
  5. Step 5: Solve for x
    x = 220,737,444,922.22/664,641.90
  6. Step 6: Final answer
    x = 332,114.85

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Half scale
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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.