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Finding the Fourth Proportional to 279,138.01, 418,548.45 and 190,498.90

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Solution

The fourth proportional to 279,138.01, 418,548.45 and 190,498.90 is: 285,640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,138.01 : 418,548.45 = 190,498.90 : x
  2. Step 2: Convert to fraction form
    279,138.01/418,548.45 = 190,498.90/x
  3. Step 3: Cross multiply
    279,138.01x = 418,548.45 × 190,498.90
  4. Step 4: Simplify right side
    279,138.01x = 79,733,019,321.71
  5. Step 5: Solve for x
    x = 79,733,019,321.71/279,138.01
  6. Step 6: Final answer
    x = 285,640.14

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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.