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Finding the Fourth Proportional to 303,344.40, 455,016.60 and 280,534.80

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Solution

The fourth proportional to 303,344.40, 455,016.60 and 280,534.80 is: 420,802.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,344.40 : 455,016.60 = 280,534.80 : x
  2. Step 2: Convert to fraction form
    303,344.40/455,016.60 = 280,534.80/x
  3. Step 3: Cross multiply
    303,344.40x = 455,016.60 × 280,534.80
  4. Step 4: Simplify right side
    303,344.40x = 127,647,990,877.68
  5. Step 5: Solve for x
    x = 127,647,990,877.68/303,344.40
  6. Step 6: Final answer
    x = 420,802.20

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1.5x scale

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.