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Finding the Fourth Proportional to 279,138.63, 418,549.38 and 190,499.52

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Solution

The fourth proportional to 279,138.63, 418,549.38 and 190,499.52 is: 285,641.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,138.63 : 418,549.38 = 190,499.52 : x
  2. Step 2: Convert to fraction form
    279,138.63/418,549.38 = 190,499.52/x
  3. Step 3: Cross multiply
    279,138.63x = 418,549.38 × 190,499.52
  4. Step 4: Simplify right side
    279,138.63x = 79,733,455,986.30
  5. Step 5: Solve for x
    x = 79,733,455,986.30/279,138.63
  6. Step 6: Final answer
    x = 285,641.07

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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.