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Finding the Fourth Proportional to 279,044.70, 385,077.15 and 151,723.50

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Solution

The fourth proportional to 279,044.70, 385,077.15 and 151,723.50 is: 209,375.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,044.70 : 385,077.15 = 151,723.50 : x
  2. Step 2: Convert to fraction form
    279,044.70/385,077.15 = 151,723.50/x
  3. Step 3: Cross multiply
    279,044.70x = 385,077.15 × 151,723.50
  4. Step 4: Simplify right side
    279,044.70x = 58,425,252,968.03
  5. Step 5: Solve for x
    x = 58,425,252,968.03/279,044.70
  6. Step 6: Final answer
    x = 209,375.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.