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Finding the Fourth Proportional to 354,557.21, 489,367.85 and 225,469.53

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Solution

The fourth proportional to 354,557.21, 489,367.85 and 225,469.53 is: 311,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,557.21 : 489,367.85 = 225,469.53 : x
  2. Step 2: Convert to fraction form
    354,557.21/489,367.85 = 225,469.53/x
  3. Step 3: Cross multiply
    354,557.21x = 489,367.85 × 225,469.53
  4. Step 4: Simplify right side
    354,557.21x = 110,337,539,136.61
  5. Step 5: Solve for x
    x = 110,337,539,136.61/354,557.21
  6. Step 6: Final answer
    x = 311,198.13

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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.