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Finding the Fourth Proportional to 279,835.92, 386,169.12 and 152,512.56

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Solution

The fourth proportional to 279,835.92, 386,169.12 and 152,512.56 is: 210,464.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,835.92 : 386,169.12 = 152,512.56 : x
  2. Step 2: Convert to fraction form
    279,835.92/386,169.12 = 152,512.56/x
  3. Step 3: Cross multiply
    279,835.92x = 386,169.12 × 152,512.56
  4. Step 4: Simplify right side
    279,835.92x = 58,895,641,084.15
  5. Step 5: Solve for x
    x = 58,895,641,084.15/279,835.92
  6. Step 6: Final answer
    x = 210,464.91

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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.