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Finding the Fourth Proportional to 418,665.36, 628,002.90 and 398,245.88

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Solution

The fourth proportional to 418,665.36, 628,002.90 and 398,245.88 is: 597,373.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,665.36 : 628,002.90 = 398,245.88 : x
  2. Step 2: Convert to fraction form
    418,665.36/628,002.90 = 398,245.88/x
  3. Step 3: Cross multiply
    418,665.36x = 628,002.90 × 398,245.88
  4. Step 4: Simplify right side
    418,665.36x = 250,099,569,123.06
  5. Step 5: Solve for x
    x = 250,099,569,123.06/418,665.36
  6. Step 6: Final answer
    x = 597,373.44

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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.