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Finding the Fourth Proportional to 326,498.74, 489,780.92 and 121,388.21

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Solution

The fourth proportional to 326,498.74, 489,780.92 and 121,388.21 is: 182,094.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,498.74 : 489,780.92 = 121,388.21 : x
  2. Step 2: Convert to fraction form
    326,498.74/489,780.92 = 121,388.21/x
  3. Step 3: Cross multiply
    326,498.74x = 489,780.92 × 121,388.21
  4. Step 4: Simplify right side
    326,498.74x = 59,453,629,386.20
  5. Step 5: Solve for x
    x = 59,453,629,386.20/326,498.74
  6. Step 6: Final answer
    x = 182,094.51

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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.