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Finding the Fourth Proportional to 502,439.70, 693,358.92 and 276,080.34

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Solution

The fourth proportional to 502,439.70, 693,358.92 and 276,080.34 is: 380,986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,439.70 : 693,358.92 = 276,080.34 : x
  2. Step 2: Convert to fraction form
    502,439.70/693,358.92 = 276,080.34/x
  3. Step 3: Cross multiply
    502,439.70x = 693,358.92 × 276,080.34
  4. Step 4: Simplify right side
    502,439.70x = 191,422,766,375.63
  5. Step 5: Solve for x
    x = 191,422,766,375.63/502,439.70
  6. Step 6: Final answer
    x = 380,986.55

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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.