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Finding the Fourth Proportional to 328,394.25, 492,612.15 and 138,819.29

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Solution

The fourth proportional to 328,394.25, 492,612.15 and 138,819.29 is: 208,237.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,394.25 : 492,612.15 = 138,819.29 : x
  2. Step 2: Convert to fraction form
    328,394.25/492,612.15 = 138,819.29/x
  3. Step 3: Cross multiply
    328,394.25x = 492,612.15 × 138,819.29
  4. Step 4: Simplify right side
    328,394.25x = 68,384,068,908.37
  5. Step 5: Solve for x
    x = 68,384,068,908.37/328,394.25
  6. Step 6: Final answer
    x = 208,237.72

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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.