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Finding the Fourth Proportional to 279,578.79, 385,805.03 and 158,703.91

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Solution

The fourth proportional to 279,578.79, 385,805.03 and 158,703.91 is: 219,003.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,578.79 : 385,805.03 = 158,703.91 : x
  2. Step 2: Convert to fraction form
    279,578.79/385,805.03 = 158,703.91/x
  3. Step 3: Cross multiply
    279,578.79x = 385,805.03 × 158,703.91
  4. Step 4: Simplify right side
    279,578.79x = 61,228,765,000.64
  5. Step 5: Solve for x
    x = 61,228,765,000.64/279,578.79
  6. Step 6: Final answer
    x = 219,003.61

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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.