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Finding the Fourth Proportional to 354,520.84, 489,151.29 and 216,664.60

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Solution

The fourth proportional to 354,520.84, 489,151.29 and 216,664.60 is: 298,943.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,520.84 : 489,151.29 = 216,664.60 : x
  2. Step 2: Convert to fraction form
    354,520.84/489,151.29 = 216,664.60/x
  3. Step 3: Cross multiply
    354,520.84x = 489,151.29 × 216,664.60
  4. Step 4: Simplify right side
    354,520.84x = 105,981,768,587.33
  5. Step 5: Solve for x
    x = 105,981,768,587.33/354,520.84
  6. Step 6: Final answer
    x = 298,943.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.