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Finding the Fourth Proportional to 354,989.59, 489,867.35 and 193,813.56

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Solution

The fourth proportional to 354,989.59, 489,867.35 and 193,813.56 is: 267,452.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,989.59 : 489,867.35 = 193,813.56 : x
  2. Step 2: Convert to fraction form
    354,989.59/489,867.35 = 193,813.56/x
  3. Step 3: Cross multiply
    354,989.59x = 489,867.35 × 193,813.56
  4. Step 4: Simplify right side
    354,989.59x = 94,942,934,062.20
  5. Step 5: Solve for x
    x = 94,942,934,062.20/354,989.59
  6. Step 6: Final answer
    x = 267,452.73

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1.5x scale

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.