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Finding the Fourth Proportional to 279,879, 386,227.28 and 152,553.48

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Solution

The fourth proportional to 279,879, 386,227.28 and 152,553.48 is: 210,520.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,879 : 386,227.28 = 152,553.48 : x
  2. Step 2: Convert to fraction form
    279,879/386,227.28 = 152,553.48/x
  3. Step 3: Cross multiply
    279,879x = 386,227.28 × 152,553.48
  4. Step 4: Simplify right side
    279,879x = 58,920,315,634.93
  5. Step 5: Solve for x
    x = 58,920,315,634.93/279,879
  6. Step 6: Final answer
    x = 210,520.67

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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.