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Finding the Fourth Proportional to 279,468, 385,695 and 158,641.92

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Solution

The fourth proportional to 279,468, 385,695 and 158,641.92 is: 218,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,468 : 385,695 = 158,641.92 : x
  2. Step 2: Convert to fraction form
    279,468/385,695 = 158,641.92/x
  3. Step 3: Cross multiply
    279,468x = 385,695 × 158,641.92
  4. Step 4: Simplify right side
    279,468x = 61,187,395,334.40
  5. Step 5: Solve for x
    x = 61,187,395,334.40/279,468
  6. Step 6: Final answer
    x = 218,942.40

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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.