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Finding the Fourth Proportional to 279,900.87, 386,262.61 and 157,393.67

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Solution

The fourth proportional to 279,900.87, 386,262.61 and 157,393.67 is: 217,202.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,900.87 : 386,262.61 = 157,393.67 : x
  2. Step 2: Convert to fraction form
    279,900.87/386,262.61 = 157,393.67/x
  3. Step 3: Cross multiply
    279,900.87x = 386,262.61 × 157,393.67
  4. Step 4: Simplify right side
    279,900.87x = 60,795,287,446.88
  5. Step 5: Solve for x
    x = 60,795,287,446.88/279,900.87
  6. Step 6: Final answer
    x = 217,202.93

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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.