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Finding the Fourth Proportional to 279,134.51, 418,543.20 and 190,495.40

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Solution

The fourth proportional to 279,134.51, 418,543.20 and 190,495.40 is: 285,634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,134.51 : 418,543.20 = 190,495.40 : x
  2. Step 2: Convert to fraction form
    279,134.51/418,543.20 = 190,495.40/x
  3. Step 3: Cross multiply
    279,134.51x = 418,543.20 × 190,495.40
  4. Step 4: Simplify right side
    279,134.51x = 79,730,552,208.56
  5. Step 5: Solve for x
    x = 79,730,552,208.56/279,134.51
  6. Step 6: Final answer
    x = 285,634.88

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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.