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Finding the Fourth Proportional to 326,513.38, 489,959.20 and 136,956.82

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Solution

The fourth proportional to 326,513.38, 489,959.20 and 136,956.82 is: 205,514.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,513.38 : 489,959.20 = 136,956.82 : x
  2. Step 2: Convert to fraction form
    326,513.38/489,959.20 = 136,956.82/x
  3. Step 3: Cross multiply
    326,513.38x = 489,959.20 × 136,956.82
  4. Step 4: Simplify right side
    326,513.38x = 67,103,253,961.74
  5. Step 5: Solve for x
    x = 67,103,253,961.74/326,513.38
  6. Step 6: Final answer
    x = 205,514.56

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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.