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Finding the Fourth Proportional to 326,370.69, 489,579.75 and 136,640.25

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Solution

The fourth proportional to 326,370.69, 489,579.75 and 136,640.25 is: 204,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,370.69 : 489,579.75 = 136,640.25 : x
  2. Step 2: Convert to fraction form
    326,370.69/489,579.75 = 136,640.25/x
  3. Step 3: Cross multiply
    326,370.69x = 489,579.75 × 136,640.25
  4. Step 4: Simplify right side
    326,370.69x = 66,896,299,434.94
  5. Step 5: Solve for x
    x = 66,896,299,434.94/326,370.69
  6. Step 6: Final answer
    x = 204,970.30

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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.