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Finding the Fourth Proportional to 326,537.38, 489,995.25 and 136,981

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Solution

The fourth proportional to 326,537.38, 489,995.25 and 136,981 is: 205,550.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,537.38 : 489,995.25 = 136,981 : x
  2. Step 2: Convert to fraction form
    326,537.38/489,995.25 = 136,981/x
  3. Step 3: Cross multiply
    326,537.38x = 489,995.25 × 136,981
  4. Step 4: Simplify right side
    326,537.38x = 67,120,039,340.25
  5. Step 5: Solve for x
    x = 67,120,039,340.25/326,537.38
  6. Step 6: Final answer
    x = 205,550.86

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1.5x scale

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.