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Finding the Fourth Proportional to 326,246.40, 489,345.30 and 136,657.80

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Solution

The fourth proportional to 326,246.40, 489,345.30 and 136,657.80 is: 204,976.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,246.40 : 489,345.30 = 136,657.80 : x
  2. Step 2: Convert to fraction form
    326,246.40/489,345.30 = 136,657.80/x
  3. Step 3: Cross multiply
    326,246.40x = 489,345.30 × 136,657.80
  4. Step 4: Simplify right side
    326,246.40x = 66,872,852,138.34
  5. Step 5: Solve for x
    x = 66,872,852,138.34/326,246.40
  6. Step 6: Final answer
    x = 204,976.52

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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.