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Finding the Fourth Proportional to 629,856,618.40, 944,784,927.60 and 399,990,671.20

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Solution

The fourth proportional to 629,856,618.40, 944,784,927.60 and 399,990,671.20 is: 599,986,006.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,856,618.40 : 944,784,927.60 = 399,990,671.20 : x
  2. Step 2: Convert to fraction form
    629,856,618.40/944,784,927.60 = 399,990,671.20/x
  3. Step 3: Cross multiply
    629,856,618.40x = 944,784,927.60 × 399,990,671.20
  4. Step 4: Simplify right side
    629,856,618.40x = 377,905,157,330,367,424
  5. Step 5: Solve for x
    x = 377,905,157,330,367,424/629,856,618.40
  6. Step 6: Final answer
    x = 599,986,006.80

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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.