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Finding the Fourth Proportional to 664,415.20, 996,622.80 and 487,268.20

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Solution

The fourth proportional to 664,415.20, 996,622.80 and 487,268.20 is: 730,902.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,415.20 : 996,622.80 = 487,268.20 : x
  2. Step 2: Convert to fraction form
    664,415.20/996,622.80 = 487,268.20/x
  3. Step 3: Cross multiply
    664,415.20x = 996,622.80 × 487,268.20
  4. Step 4: Simplify right side
    664,415.20x = 485,622,597,834.96
  5. Step 5: Solve for x
    x = 485,622,597,834.96/664,415.20
  6. Step 6: Final answer
    x = 730,902.30

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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.