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Finding the Fourth Proportional to 664,303,014.40, 996,454,521.60 and 660,476,639.20

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Solution

The fourth proportional to 664,303,014.40, 996,454,521.60 and 660,476,639.20 is: 990,714,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,303,014.40 : 996,454,521.60 = 660,476,639.20 : x
  2. Step 2: Convert to fraction form
    664,303,014.40/996,454,521.60 = 660,476,639.20/x
  3. Step 3: Cross multiply
    664,303,014.40x = 996,454,521.60 × 660,476,639.20
  4. Step 4: Simplify right side
    664,303,014.40x = 658,134,933,542,011,904
  5. Step 5: Solve for x
    x = 658,134,933,542,011,904/664,303,014.40
  6. Step 6: Final answer
    x = 990,714,958.80

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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.