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Finding the Fourth Proportional to 279,818.25, 386,137.92 and 152,491.11

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Solution

The fourth proportional to 279,818.25, 386,137.92 and 152,491.11 is: 210,431.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,818.25 : 386,137.92 = 152,491.11 : x
  2. Step 2: Convert to fraction form
    279,818.25/386,137.92 = 152,491.11/x
  3. Step 3: Cross multiply
    279,818.25x = 386,137.92 × 152,491.11
  4. Step 4: Simplify right side
    279,818.25x = 58,882,599,271.44
  5. Step 5: Solve for x
    x = 58,882,599,271.44/279,818.25
  6. Step 6: Final answer
    x = 210,431.59

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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.