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Finding the Fourth Proportional to 279,356.82, 385,521.15 and 158,503.20

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Solution

The fourth proportional to 279,356.82, 385,521.15 and 158,503.20 is: 218,739.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,356.82 : 385,521.15 = 158,503.20 : x
  2. Step 2: Convert to fraction form
    279,356.82/385,521.15 = 158,503.20/x
  3. Step 3: Cross multiply
    279,356.82x = 385,521.15 × 158,503.20
  4. Step 4: Simplify right side
    279,356.82x = 61,106,335,942.68
  5. Step 5: Solve for x
    x = 61,106,335,942.68/279,356.82
  6. Step 6: Final answer
    x = 218,739.37

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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.