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Finding the Fourth Proportional to 664,420.40, 996,630.60 and 383,609.60

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Solution

The fourth proportional to 664,420.40, 996,630.60 and 383,609.60 is: 575,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,420.40 : 996,630.60 = 383,609.60 : x
  2. Step 2: Convert to fraction form
    664,420.40/996,630.60 = 383,609.60/x
  3. Step 3: Cross multiply
    664,420.40x = 996,630.60 × 383,609.60
  4. Step 4: Simplify right side
    664,420.40x = 382,317,065,813.76
  5. Step 5: Solve for x
    x = 382,317,065,813.76/664,420.40
  6. Step 6: Final answer
    x = 575,414.40

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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.