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Finding the Fourth Proportional to 279,976.92, 386,359.74 and 152,655

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Solution

The fourth proportional to 279,976.92, 386,359.74 and 152,655 is: 210,659.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,976.92 : 386,359.74 = 152,655 : x
  2. Step 2: Convert to fraction form
    279,976.92/386,359.74 = 152,655/x
  3. Step 3: Cross multiply
    279,976.92x = 386,359.74 × 152,655
  4. Step 4: Simplify right side
    279,976.92x = 58,979,746,109.70
  5. Step 5: Solve for x
    x = 58,979,746,109.70/279,976.92
  6. Step 6: Final answer
    x = 210,659.31

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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.