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Finding the Fourth Proportional to 300,688.74, 449,988.84 and 186,789.78

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Solution

The fourth proportional to 300,688.74, 449,988.84 and 186,789.78 is: 279,535.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,688.74 : 449,988.84 = 186,789.78 : x
  2. Step 2: Convert to fraction form
    300,688.74/449,988.84 = 186,789.78/x
  3. Step 3: Cross multiply
    300,688.74x = 449,988.84 × 186,789.78
  4. Step 4: Simplify right side
    300,688.74x = 84,053,316,426.06
  5. Step 5: Solve for x
    x = 84,053,316,426.06/300,688.74
  6. Step 6: Final answer
    x = 279,535.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.