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Finding the Fourth Proportional to 279,716.76, 386,016.64 and 152,400.56

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Solution

The fourth proportional to 279,716.76, 386,016.64 and 152,400.56 is: 210,316.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,716.76 : 386,016.64 = 152,400.56 : x
  2. Step 2: Convert to fraction form
    279,716.76/386,016.64 = 152,400.56/x
  3. Step 3: Cross multiply
    279,716.76x = 386,016.64 × 152,400.56
  4. Step 4: Simplify right side
    279,716.76x = 58,829,149,794.23
  5. Step 5: Solve for x
    x = 58,829,149,794.23/279,716.76
  6. Step 6: Final answer
    x = 210,316.86

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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.