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Finding the Fourth Proportional to 303,438.60, 454,121.10 and 266,113.80

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Solution

The fourth proportional to 303,438.60, 454,121.10 and 266,113.80 is: 398,261.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,438.60 : 454,121.10 = 266,113.80 : x
  2. Step 2: Convert to fraction form
    303,438.60/454,121.10 = 266,113.80/x
  3. Step 3: Cross multiply
    303,438.60x = 454,121.10 × 266,113.80
  4. Step 4: Simplify right side
    303,438.60x = 120,847,891,581.18
  5. Step 5: Solve for x
    x = 120,847,891,581.18/303,438.60
  6. Step 6: Final answer
    x = 398,261.43

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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.