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Finding the Fourth Proportional to 354,638.66, 489,400.62 and 193,493.61

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Solution

The fourth proportional to 354,638.66, 489,400.62 and 193,493.61 is: 267,020.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,638.66 : 489,400.62 = 193,493.61 : x
  2. Step 2: Convert to fraction form
    354,638.66/489,400.62 = 193,493.61/x
  3. Step 3: Cross multiply
    354,638.66x = 489,400.62 × 193,493.61
  4. Step 4: Simplify right side
    354,638.66x = 94,695,892,700.04
  5. Step 5: Solve for x
    x = 94,695,892,700.04/354,638.66
  6. Step 6: Final answer
    x = 267,020.79

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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.