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Finding the Fourth Proportional to 426,000,873.60, 638,497,425.60 and 221,423,644.80

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Solution

The fourth proportional to 426,000,873.60, 638,497,425.60 and 221,423,644.80 is: 331,873,561.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,000,873.60 : 638,497,425.60 = 221,423,644.80 : x
  2. Step 2: Convert to fraction form
    426,000,873.60/638,497,425.60 = 221,423,644.80/x
  3. Step 3: Cross multiply
    426,000,873.60x = 638,497,425.60 × 221,423,644.80
  4. Step 4: Simplify right side
    426,000,873.60x = 141,378,427,171,768,832
  5. Step 5: Solve for x
    x = 141,378,427,171,768,832/426,000,873.60
  6. Step 6: Final answer
    x = 331,873,561.61

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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.