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Finding the Fourth Proportional to 656,179,980.40, 984,269,970.60 and 645,976,313.20

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Solution

The fourth proportional to 656,179,980.40, 984,269,970.60 and 645,976,313.20 is: 968,964,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,179,980.40 : 984,269,970.60 = 645,976,313.20 : x
  2. Step 2: Convert to fraction form
    656,179,980.40/984,269,970.60 = 645,976,313.20/x
  3. Step 3: Cross multiply
    656,179,980.40x = 984,269,970.60 × 645,976,313.20
  4. Step 4: Simplify right side
    656,179,980.40x = 635,815,086,801,660,416
  5. Step 5: Solve for x
    x = 635,815,086,801,660,416/656,179,980.40
  6. Step 6: Final answer
    x = 968,964,469.80

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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.