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Finding the Fourth Proportional to 279,486.62, 385,672.07 and 158,630.36

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Solution

The fourth proportional to 279,486.62, 385,672.07 and 158,630.36 is: 218,898.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,486.62 : 385,672.07 = 158,630.36 : x
  2. Step 2: Convert to fraction form
    279,486.62/385,672.07 = 158,630.36/x
  3. Step 3: Cross multiply
    279,486.62x = 385,672.07 × 158,630.36
  4. Step 4: Simplify right side
    279,486.62x = 61,179,299,306.05
  5. Step 5: Solve for x
    x = 61,179,299,306.05/279,486.62
  6. Step 6: Final answer
    x = 218,898.85

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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.