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Finding the Fourth Proportional to 279,532.86, 385,765.92 and 158,679.24

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Solution

The fourth proportional to 279,532.86, 385,765.92 and 158,679.24 is: 218,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,532.86 : 385,765.92 = 158,679.24 : x
  2. Step 2: Convert to fraction form
    279,532.86/385,765.92 = 158,679.24/x
  3. Step 3: Cross multiply
    279,532.86x = 385,765.92 × 158,679.24
  4. Step 4: Simplify right side
    279,532.86x = 61,213,043,003.50
  5. Step 5: Solve for x
    x = 61,213,043,003.50/279,532.86
  6. Step 6: Final answer
    x = 218,983.35

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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.