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Finding the Fourth Proportional to 664,903.20, 997,354.80 and 613,581.60

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Solution

The fourth proportional to 664,903.20, 997,354.80 and 613,581.60 is: 920,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,903.20 : 997,354.80 = 613,581.60 : x
  2. Step 2: Convert to fraction form
    664,903.20/997,354.80 = 613,581.60/x
  3. Step 3: Cross multiply
    664,903.20x = 997,354.80 × 613,581.60
  4. Step 4: Simplify right side
    664,903.20x = 611,958,553,951.68
  5. Step 5: Solve for x
    x = 611,958,553,951.68/664,903.20
  6. Step 6: Final answer
    x = 920,372.40

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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.