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Finding the Fourth Proportional to 278,991.58, 385,011.11 and 151,669.91

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Solution

The fourth proportional to 278,991.58, 385,011.11 and 151,669.91 is: 209,305.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,991.58 : 385,011.11 = 151,669.91 : x
  2. Step 2: Convert to fraction form
    278,991.58/385,011.11 = 151,669.91/x
  3. Step 3: Cross multiply
    278,991.58x = 385,011.11 × 151,669.91
  4. Step 4: Simplify right side
    278,991.58x = 58,394,600,402.70
  5. Step 5: Solve for x
    x = 58,394,600,402.70/278,991.58
  6. Step 6: Final answer
    x = 209,305.96

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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.